{"id": "oth_0001", "subject": "other", "topic": "geography", "lang": "cs", "kind": "worked_example", "question": "Praha ukazuje 9:00; město je +3 h napřed. Zjisti místní čas.", "choices": null, "answer": "Místní čas: 12:00.", "steps": ["Základ 9.", "Přičti 3.", "= 12:00."], "text": "Answer: Místní čas: 12:00.\nSteps:\n1. Základ 9.\n2. Přičti 3.\n3. = 12:00."}
{"id": "oth_0002", "subject": "other", "topic": "astronomy", "lang": "cs", "kind": "concept", "question": "Co je světelný rok?", "choices": null, "answer": "Vzdálenost, již světlo urazí za rok.", "steps": ["Vzdálenost, již světlo urazí za rok.", "Odpověď tedy platí: Vzdálenost, již světlo urazí za rok."], "text": "Answer: Vzdálenost, již světlo urazí za rok.\nSteps:\n1. Vzdálenost, již světlo urazí za rok.\n2. Odpověď tedy platí: Vzdálenost, již světlo urazí za rok."}
{"id": "oth_0003", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "Pasta needs 1 litre per 100 g. How many litres for 200 g?", "choices": {"A": "2", "B": "1", "C": "3", "D": "4"}, "answer": "Water needed: 2 litres.", "steps": ["200/100 × 1.", "= 2.", "Select option A."], "text": "Answer: 2\nSteps:\n1. 200/100 × 1.\n2. = 2.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0004", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "What is bandwidth?", "choices": null, "answer": "Data rate per second, sizing downloads and streams.", "steps": ["Data rate per second, sizing downloads and streams.", "So the answer stands: Data rate per second, sizing downloads and streams."], "text": "Answer: Data rate per second, sizing downloads and streams.\nSteps:\n1. Data rate per second, sizing downloads and streams.\n2. So the answer stands: Data rate per second, sizing downloads and streams."}
{"id": "oth_0005", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "A song has 2 verses of 4 lines. How many lines total?", "choices": {"A": "8", "B": "4", "C": "12", "D": "16"}, "answer": "Total lines: 8.", "steps": ["2 × 4.", "= 8.", "Select option A."], "text": "Answer: 8\nSteps:\n1. 2 × 4.\n2. = 8.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0006", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "A pool is 50 m; a swimmer does 10 laps. How many metres?", "choices": {"A": "500", "B": "450", "C": "550", "D": "600"}, "answer": "Distance is 500 m.", "steps": ["50 × 10.", "= 500.", "Select option A."], "text": "Answer: 500\nSteps:\n1. 50 × 10.\n2. = 500.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0007", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "Prague shows 12:00; a city is +2 h ahead. What time is it there?", "choices": {"A": "14:00", "B": "13:00", "C": "15:00", "D": "16:00"}, "answer": "Local time is 14:00.", "steps": ["12 + 2.", "= 14:00.", "Select option A."], "text": "Answer: 14:00\nSteps:\n1. 12 + 2.\n2. = 14:00.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0008", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "What is a light-year?", "choices": null, "answer": "The distance light travels in one year, about 9.5 trillion km.", "steps": ["The distance light travels in one year, about 9.5 trillion km.", "So the answer stands: The distance light travels in one year, about 9.5 trillion km."], "text": "Answer: The distance light travels in one year, about 9.5 trillion km.\nSteps:\n1. The distance light travels in one year, about 9.5 trillion km.\n2. So the answer stands: The distance light travels in one year, about 9.5 trillion km."}
{"id": "oth_0009", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "Why does water boil?", "choices": null, "answer": "Vapour pressure matches air at 100 °C, freeing bubbles throughout.", "steps": ["Vapour pressure matches air at 100 °C, freeing bubbles throughout.", "So the answer stands: Vapour pressure matches air at 100 °C, freeing bubbles throughout."], "text": "Answer: Vapour pressure matches air at 100 °C, freeing bubbles throughout.\nSteps:\n1. Vapour pressure matches air at 100 °C, freeing bubbles throughout.\n2. So the answer stands: Vapour pressure matches air at 100 °C, freeing bubbles throughout."}
{"id": "oth_0010", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A 200 MB file downloads at 50 MB/s. Compute the seconds.", "choices": null, "answer": "Time: 4 seconds.", "steps": ["200 / 50.", "= 4."], "text": "Answer: Time: 4 seconds.\nSteps:\n1. 200 / 50.\n2. = 4."}
{"id": "oth_0011", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "What is rhythm?", "choices": null, "answer": "Patterned beats in time that make music move.", "steps": ["Patterned beats in time that make music move.", "So the answer stands: Patterned beats in time that make music move."], "text": "Answer: Patterned beats in time that make music move.\nSteps:\n1. Patterned beats in time that make music move.\n2. So the answer stands: Patterned beats in time that make music move."}
{"id": "oth_0012", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "A pool is 50 m; a swimmer does 12 laps. Compute the metres.", "choices": null, "answer": "Distance: 600 m.", "steps": ["50 × 12.", "= 600."], "text": "Answer: Distance: 600 m.\nSteps:\n1. 50 × 12.\n2. = 600."}
{"id": "oth_0013", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "A 1:100000 map shows 2 cm. How many km is that really?", "choices": {"A": "1 km", "B": "2 km", "C": "3 km", "D": "4 km"}, "answer": "Real distance is 2 km.", "steps": ["1 cm = 1 km.", "2 cm = 2 km.", "Select option B."], "text": "Answer: 2 km\nSteps:\n1. 1 cm = 1 km.\n2. 2 cm = 2 km.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0014", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "Why planets orbit?", "choices": null, "answer": "The Sun's gravity bends their paths into ellipses forever.", "steps": ["The Sun's gravity bends their paths into ellipses forever.", "So the answer stands: The Sun's gravity bends their paths into ellipses forever."], "text": "Answer: The Sun's gravity bends their paths into ellipses forever.\nSteps:\n1. The Sun's gravity bends their paths into ellipses forever.\n2. So the answer stands: The Sun's gravity bends their paths into ellipses forever."}
{"id": "oth_0015", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "A 2000 mAh battery feeds a 500 mA device. How many hours?", "choices": {"A": "3", "B": "4", "C": "5", "D": "6"}, "answer": "Runtime is 4 hours.", "steps": ["2000 / 500.", "= 4.", "Select option B."], "text": "Answer: 4\nSteps:\n1. 2000 / 500.\n2. = 4.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0016", "subject": "other", "topic": "technology", "lang": "cs", "kind": "multiple_choice", "question": "Soubor 100 MB se stahuje 50 MB/s. Kolik sekund?", "choices": {"A": "2", "B": "1", "C": "3", "D": "4"}, "answer": "Stahování trvá 2 sekundy.", "steps": ["100 / 50.", "= 2.", "Vyber možnost A."], "text": "Answer: 2\nSteps:\n1. 100 / 50.\n2. = 2.\n3. Vyber možnost A.\nAnswer: (A)"}
{"id": "oth_0017", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "An orchestra has 10 strings and 8 wind players. How many total?", "choices": {"A": "13", "B": "18", "C": "23", "D": "28"}, "answer": "Total players: 18.", "steps": ["10 + 8.", "= 18.", "Select option B."], "text": "Answer: 18\nSteps:\n1. 10 + 8.\n2. = 18.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0018", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "Training burns 300 kcal per session over 3 sessions. Compute total kcal.", "choices": null, "answer": "Total: 900 kcal.", "steps": ["300 × 3.", "= 900."], "text": "Answer: Total: 900 kcal.\nSteps:\n1. 300 × 3.\n2. = 900."}
{"id": "oth_0019", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "What are time zones?", "choices": null, "answer": "Earth's 24 zones keep local noon near the Sun, shifting clocks by longitude.", "steps": ["Earth's 24 zones keep local noon near the Sun, shifting clocks by longitude.", "So the answer stands: Earth's 24 zones keep local noon near the Sun, shifting clocks by longitude."], "text": "Answer: Earth's 24 zones keep local noon near the Sun, shifting clocks by longitude.\nSteps:\n1. Earth's 24 zones keep local noon near the Sun, shifting clocks by longitude.\n2. So the answer stands: Earth's 24 zones keep local noon near the Sun, shifting clocks by longitude."}
{"id": "oth_0020", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "Sunlight takes 8 min per AU. Compute light time to 3 AU.", "choices": null, "answer": "Light time: 24 min.", "steps": ["Per AU: 8.", "Distance: 3.", "8 × 3 = 24."], "text": "Answer: Light time: 24 min.\nSteps:\n1. Per AU: 8.\n2. Distance: 3.\n3. 8 × 3 = 24."}
{"id": "oth_0021", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "Pasta needs 1 litre per 100 g. Compute litres for 300 g.", "choices": null, "answer": "Water needed: 3 litres.", "steps": ["300/100 = 3.", "3 × 1.", "= 3."], "text": "Answer: Water needed: 3 litres.\nSteps:\n1. 300/100 = 3.\n2. 3 × 1.\n3. = 3."}
{"id": "oth_0022", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "A 100 MB file downloads at 50 MB/s. How many seconds?", "choices": {"A": "2", "B": "1", "C": "3", "D": "4"}, "answer": "Download takes 2 seconds.", "steps": ["100 / 50.", "= 2.", "Select option A."], "text": "Answer: 2\nSteps:\n1. 100 / 50.\n2. = 2.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0023", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A song has 3 verses of 4 lines. Count all lines.", "choices": null, "answer": "Total: 12.", "steps": ["Verses: 3.", "Each: 4.", "3 × 4 = 12."], "text": "Answer: Total: 12.\nSteps:\n1. Verses: 3.\n2. Each: 4.\n3. 3 × 4 = 12."}
{"id": "oth_0024", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "A run burns 60 kcal/km over 5 km. How many kcal total?", "choices": {"A": "240", "B": "300", "C": "360", "D": "420"}, "answer": "Energy burned: 300 kcal.", "steps": ["60 × 5.", "= 300.", "Select option B."], "text": "Answer: 300\nSteps:\n1. 60 × 5.\n2. = 300.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0025", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "A country of 6 million people has 3 regions. How many million per region?", "choices": {"A": "1", "B": "3", "C": "2", "D": "4"}, "answer": "Per region: 2 million.", "steps": ["6 / 3.", "= 2.", "Select option C."], "text": "Answer: 2\nSteps:\n1. 6 / 3.\n2. = 2.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0026", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "Sunlight takes 8 min per AU. How long to a planet at 2 AU?", "choices": {"A": "16 min", "B": "8 min", "C": "24 min", "D": "32 min"}, "answer": "Light time is 16 min.", "steps": ["8 × 2.", "= 16 min.", "Select option A."], "text": "Answer: 16 min\nSteps:\n1. 8 × 2.\n2. = 16 min.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0027", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "Rainfall is 5 mm on 10 m². How many litres fell?", "choices": {"A": "0", "B": "100", "C": "50", "D": "150"}, "answer": "Rain total: 50 litres.", "steps": ["1 mm/m² = 1 L.", "5 × 10 = 50.", "Select option C."], "text": "Answer: 50\nSteps:\n1. 1 mm/m² = 1 L.\n2. 5 × 10 = 50.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0028", "subject": "other", "topic": "technology", "lang": "cs", "kind": "concept", "question": "Co je šířka pásma?", "choices": null, "answer": "Datový tok za sekundu.", "steps": ["Datový tok za sekundu.", "Odpověď tedy platí: Datový tok za sekundu."], "text": "Answer: Datový tok za sekundu.\nSteps:\n1. Datový tok za sekundu.\n2. Odpověď tedy platí: Datový tok za sekundu."}
{"id": "oth_0029", "subject": "other", "topic": "arts_basics", "lang": "cs", "kind": "worked_example", "question": "Píseň má 3 sloky po 4 verších. Spočítej všechny verše.", "choices": null, "answer": "Celkem: 12.", "steps": ["Slok: 3.", "Každá: 4.", "3 × 4 = 12."], "text": "Answer: Celkem: 12.\nSteps:\n1. Slok: 3.\n2. Každá: 4.\n3. 3 × 4 = 12."}
{"id": "oth_0030", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "Why warm up?", "choices": null, "answer": "Gradual effort heats muscles and primes joints safely.", "steps": ["Gradual effort heats muscles and primes joints safely.", "So the answer stands: Gradual effort heats muscles and primes joints safely."], "text": "Answer: Gradual effort heats muscles and primes joints safely.\nSteps:\n1. Gradual effort heats muscles and primes joints safely.\n2. So the answer stands: Gradual effort heats muscles and primes joints safely."}
{"id": "oth_0031", "subject": "other", "topic": "geography", "lang": "cs", "kind": "multiple_choice", "question": "Praha ukazuje 12:00; město je +2 h napřed. Kolik hodin je tam?", "choices": {"A": "14:00", "B": "13:00", "C": "15:00", "D": "16:00"}, "answer": "Místní čas je 14:00.", "steps": ["12 + 2.", "= 14:00.", "Vyber možnost A."], "text": "Answer: 14:00\nSteps:\n1. 12 + 2.\n2. = 14:00.\n3. Vyber možnost A.\nAnswer: (A)"}
{"id": "oth_0032", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "A mission lasts 200 days with 4 checkups. Find days per checkup.", "choices": null, "answer": "Days per checkup: 50.", "steps": ["Total 200.", "Checkups 4.", "200 / 4 = 50."], "text": "Answer: Days per checkup: 50.\nSteps:\n1. Total 200.\n2. Checkups 4.\n3. 200 / 4 = 50."}
{"id": "oth_0033", "subject": "other", "topic": "everyday_science", "lang": "cs", "kind": "worked_example", "question": "Těstoviny potřebují 1 litr na 100 g. Spočítej litry na 300 g.", "choices": null, "answer": "Vody třeba: 3 litry.", "steps": ["300/100 = 3.", "3 × 1.", "= 3."], "text": "Answer: Vody třeba: 3 litry.\nSteps:\n1. 300/100 = 3.\n2. 3 × 1.\n3. = 3."}
{"id": "oth_0034", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "Why compress files?", "choices": null, "answer": "Removing redundancy shrinks storage and speeds transfers.", "steps": ["Removing redundancy shrinks storage and speeds transfers.", "So the answer stands: Removing redundancy shrinks storage and speeds transfers."], "text": "Answer: Removing redundancy shrinks storage and speeds transfers.\nSteps:\n1. Removing redundancy shrinks storage and speeds transfers.\n2. So the answer stands: Removing redundancy shrinks storage and speeds transfers."}
{"id": "oth_0035", "subject": "other", "topic": "arts_basics", "lang": "cs", "kind": "worked_example", "question": "Galerie vystavuje 15 obrazů rovnoměrně v 5 místnostech. Spočítej na místnost.", "choices": null, "answer": "Na místnost: 3.", "steps": ["Celkem: 15.", "Místností: 5.", "15 / 5 = 3."], "text": "Answer: Na místnost: 3.\nSteps:\n1. Celkem: 15.\n2. Místností: 5.\n3. 15 / 5 = 3."}
{"id": "oth_0036", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "Max heart rate is 220 − age. Compute it for age 25.", "choices": null, "answer": "Max rate: 195 bpm.", "steps": ["220 − 25.", "= 195."], "text": "Answer: Max rate: 195 bpm.\nSteps:\n1. 220 − 25.\n2. = 195."}
{"id": "oth_0037", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "Choose: what shifts clocks?", "choices": {"A": "Wind belts", "B": "Soil types", "C": "Cloud shapes", "D": "Time zones"}, "answer": "The answer is Time zones.", "steps": ["Longitude times them.", "So: Time zones.", "Select option D."], "text": "Answer: Time zones\nSteps:\n1. Longitude times them.\n2. So: Time zones.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0038", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "A telescope magnifies 20×; the Moon spans 0.5°. Compute apparent width.", "choices": null, "answer": "Apparent width: 10°.", "steps": ["0.5 × 20.", "= 10°."], "text": "Answer: Apparent width: 10°.\nSteps:\n1. 0.5 × 20.\n2. = 10°."}
{"id": "oth_0039", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "What is condensation?", "choices": null, "answer": "Cooling vapour liquefies on cold surfaces like windows.", "steps": ["Cooling vapour liquefies on cold surfaces like windows.", "So the answer stands: Cooling vapour liquefies on cold surfaces like windows."], "text": "Answer: Cooling vapour liquefies on cold surfaces like windows.\nSteps:\n1. Cooling vapour liquefies on cold surfaces like windows.\n2. So the answer stands: Cooling vapour liquefies on cold surfaces like windows."}
{"id": "oth_0040", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "What is a pixel?", "choices": null, "answer": "One picture dot; millions form sharp screens.", "steps": ["One picture dot; millions form sharp screens.", "So the answer stands: One picture dot; millions form sharp screens."], "text": "Answer: One picture dot; millions form sharp screens.\nSteps:\n1. One picture dot; millions form sharp screens.\n2. So the answer stands: One picture dot; millions form sharp screens."}
{"id": "oth_0041", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "Why harmony?", "choices": null, "answer": "Stacked notes blend into pleasing chords.", "steps": ["Stacked notes blend into pleasing chords.", "So the answer stands: Stacked notes blend into pleasing chords."], "text": "Answer: Stacked notes blend into pleasing chords.\nSteps:\n1. Stacked notes blend into pleasing chords.\n2. So the answer stands: Stacked notes blend into pleasing chords."}
{"id": "oth_0042", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "What is VO2max?", "choices": null, "answer": "Peak oxygen use rating endurance fitness.", "steps": ["Peak oxygen use rating endurance fitness.", "So the answer stands: Peak oxygen use rating endurance fitness."], "text": "Answer: Peak oxygen use rating endurance fitness.\nSteps:\n1. Peak oxygen use rating endurance fitness.\n2. So the answer stands: Peak oxygen use rating endurance fitness."}
{"id": "oth_0043", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "Prague shows 9:00; a city is +3 h ahead. Find the local time.", "choices": null, "answer": "Local time: 12:00.", "steps": ["Base 9.", "Add 3.", "= 12:00."], "text": "Answer: Local time: 12:00.\nSteps:\n1. Base 9.\n2. Add 3.\n3. = 12:00."}
{"id": "oth_0044", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "A planet's year is 100 days. How many days are 2 orbits?", "choices": {"A": "100 days", "B": "200 days", "C": "300 days", "D": "400 days"}, "answer": "Two orbits take 200 days.", "steps": ["2 × 100.", "= 200.", "Select option B."], "text": "Answer: 200 days\nSteps:\n1. 2 × 100.\n2. = 200.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0045", "subject": "other", "topic": "everyday_science", "lang": "cs", "kind": "multiple_choice", "question": "Těstoviny potřebují 1 litr na 100 g. Kolik litrů na 200 g?", "choices": {"A": "2", "B": "1", "C": "3", "D": "4"}, "answer": "Vody třeba: 2 litry.", "steps": ["200/100 × 1.", "= 2.", "Vyber možnost A."], "text": "Answer: 2\nSteps:\n1. 200/100 × 1.\n2. = 2.\n3. Vyber možnost A.\nAnswer: (A)"}
{"id": "oth_0046", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "Why resolution matters?", "choices": null, "answer": "More pixels show finer detail on same screens.", "steps": ["More pixels show finer detail on same screens.", "So the answer stands: More pixels show finer detail on same screens."], "text": "Answer: More pixels show finer detail on same screens.\nSteps:\n1. More pixels show finer detail on same screens.\n2. So the answer stands: More pixels show finer detail on same screens."}
{"id": "oth_0047", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A gallery shows 15 paintings in 5 rooms equally. Count per room.", "choices": null, "answer": "Per room: 3.", "steps": ["Total: 15.", "Rooms: 5.", "15 / 5 = 3."], "text": "Answer: Per room: 3.\nSteps:\n1. Total: 15.\n2. Rooms: 5.\n3. 15 / 5 = 3."}
{"id": "oth_0048", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "Why hydrate?", "choices": null, "answer": "Water replaces sweat, keeping output and focus.", "steps": ["Water replaces sweat, keeping output and focus.", "So the answer stands: Water replaces sweat, keeping output and focus."], "text": "Answer: Water replaces sweat, keeping output and focus.\nSteps:\n1. Water replaces sweat, keeping output and focus.\n2. So the answer stands: Water replaces sweat, keeping output and focus."}
{"id": "oth_0049", "subject": "other", "topic": "geography", "lang": "cs", "kind": "concept", "question": "Co jsou časová pásma?", "choices": null, "answer": "24 pásem drží poledne u Slunce.", "steps": ["24 pásem drží poledne u Slunce.", "Odpověď tedy platí: 24 pásem drží poledne u Slunce."], "text": "Answer: 24 pásem drží poledne u Slunce.\nSteps:\n1. 24 pásem drží poledne u Slunce.\n2. Odpověď tedy platí: 24 pásem drží poledne u Slunce."}
{"id": "oth_0050", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "A telescope magnifies 10×; the Moon spans 0.5°. How wide does it appear?", "choices": {"A": "0°", "B": "10°", "C": "5°", "D": "15°"}, "answer": "Apparent width is 5°.", "steps": ["0.5 × 10.", "= 5°.", "Select option C."], "text": "Answer: 5°\nSteps:\n1. 0.5 × 10.\n2. = 5°.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0051", "subject": "other", "topic": "everyday_science", "lang": "cs", "kind": "multiple_choice", "question": "Baterie 2000 mAh krmí zařízení 500 mA. Na kolik hodin?", "choices": {"A": "3", "B": "4", "C": "5", "D": "6"}, "answer": "Výdrž je 4 hodiny.", "steps": ["2000 / 500.", "= 4.", "Vyber možnost B."], "text": "Answer: 4\nSteps:\n1. 2000 / 500.\n2. = 4.\n3. Vyber možnost B.\nAnswer: (B)"}
{"id": "oth_0052", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "What is RAM?", "choices": null, "answer": "Fast working memory cleared at power-off.", "steps": ["Fast working memory cleared at power-off.", "So the answer stands: Fast working memory cleared at power-off."], "text": "Answer: Fast working memory cleared at power-off.\nSteps:\n1. Fast working memory cleared at power-off.\n2. So the answer stands: Fast working memory cleared at power-off."}
{"id": "oth_0053", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A novel has 15 chapters; 3 are read per week. Count the weeks.", "choices": null, "answer": "Weeks: 5.", "steps": ["Chapters: 15.", "Per week: 3.", "15 / 3 = 5."], "text": "Answer: Weeks: 5.\nSteps:\n1. Chapters: 15.\n2. Per week: 3.\n3. 15 / 3 = 5."}
{"id": "oth_0054", "subject": "other", "topic": "sports_science", "lang": "cs", "kind": "multiple_choice", "question": "Bazén měří 50 m; plavec dá 10 délek. Kolik metrů?", "choices": {"A": "500", "B": "450", "C": "550", "D": "600"}, "answer": "Vzdálenost je 500 m.", "steps": ["50 × 10.", "= 500.", "Vyber možnost A."], "text": "Answer: 500\nSteps:\n1. 50 × 10.\n2. = 500.\n3. Vyber možnost A.\nAnswer: (A)"}
{"id": "oth_0055", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "Choose: what flips Asian winds?", "choices": {"A": "Monsoon", "B": "Breeze", "C": "Gale", "D": "Calm"}, "answer": "The answer is Monsoon.", "steps": ["Summer drenches.", "So: Monsoon.", "Select option A."], "text": "Answer: Monsoon\nSteps:\n1. Summer drenches.\n2. So: Monsoon.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0056", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "What is a solar eclipse?", "choices": null, "answer": "The Moon blocks the Sun briefly, casting a daytime shadow.", "steps": ["The Moon blocks the Sun briefly, casting a daytime shadow.", "So the answer stands: The Moon blocks the Sun briefly, casting a daytime shadow."], "text": "Answer: The Moon blocks the Sun briefly, casting a daytime shadow.\nSteps:\n1. The Moon blocks the Sun briefly, casting a daytime shadow.\n2. So the answer stands: The Moon blocks the Sun briefly, casting a daytime shadow."}
{"id": "oth_0057", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "Choose: what frees bubbles?", "choices": {"A": "Freezing", "B": "Melting", "C": "Rust", "D": "Boiling"}, "answer": "The answer is Boiling.", "steps": ["100 °C at sea.", "So: Boiling.", "Select option D."], "text": "Answer: Boiling\nSteps:\n1. 100 °C at sea.\n2. So: Boiling.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0058", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A photo is 3000×1000 px. Compute the megapixels.", "choices": null, "answer": "Resolution: 3 MP.", "steps": ["3000×1000.", "/1e6.", "= 3."], "text": "Answer: Resolution: 3 MP.\nSteps:\n1. 3000×1000.\n2. /1e6.\n3. = 3."}
{"id": "oth_0059", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "A novel has 12 chapters; 3 are read per week. How many weeks?", "choices": {"A": "3", "B": "5", "C": "4", "D": "6"}, "answer": "Reading takes 4 weeks.", "steps": ["12 / 3.", "= 4.", "Select option C."], "text": "Answer: 4\nSteps:\n1. 12 / 3.\n2. = 4.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0060", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "What are intervals?", "choices": null, "answer": "Hard bursts plus rest boost speed efficiently.", "steps": ["Hard bursts plus rest boost speed efficiently.", "So the answer stands: Hard bursts plus rest boost speed efficiently."], "text": "Answer: Hard bursts plus rest boost speed efficiently.\nSteps:\n1. Hard bursts plus rest boost speed efficiently.\n2. So the answer stands: Hard bursts plus rest boost speed efficiently."}
{"id": "oth_0061", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "Why map scales?", "choices": null, "answer": "Scales shrink lands to paper, so 1 cm can stand for kilometres.", "steps": ["Scales shrink lands to paper, so 1 cm can stand for kilometres.", "So the answer stands: Scales shrink lands to paper, so 1 cm can stand for kilometres."], "text": "Answer: Scales shrink lands to paper, so 1 cm can stand for kilometres.\nSteps:\n1. Scales shrink lands to paper, so 1 cm can stand for kilometres.\n2. So the answer stands: Scales shrink lands to paper, so 1 cm can stand for kilometres."}
{"id": "oth_0062", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "Sunlight takes 8 min per AU. Compute light time to 4 AU.", "choices": null, "answer": "Light time: 32 min.", "steps": ["Per AU: 8.", "Distance: 4.", "8 × 4 = 32."], "text": "Answer: Light time: 32 min.\nSteps:\n1. Per AU: 8.\n2. Distance: 4.\n3. 8 × 4 = 32."}
{"id": "oth_0063", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "Choose: what puffs dough?", "choices": {"A": "Yeast CO₂", "B": "Salt crystals", "C": "Cold air", "D": "Dark flour"}, "answer": "The answer is Yeast CO₂.", "steps": ["Bubbles trapped.", "So: Yeast CO₂.", "Select option A."], "text": "Answer: Yeast CO₂\nSteps:\n1. Bubbles trapped.\n2. So: Yeast CO₂.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0064", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A backup copies 500 GB at 100 GB/h. Compute the hours.", "choices": null, "answer": "Time: 5 hours.", "steps": ["500 / 100.", "= 5."], "text": "Answer: Time: 5 hours.\nSteps:\n1. 500 / 100.\n2. = 5."}
{"id": "oth_0065", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A song has 4 verses of 4 lines. Count all lines.", "choices": null, "answer": "Total: 16.", "steps": ["Verses: 4.", "Each: 4.", "4 × 4 = 16."], "text": "Answer: Total: 16.\nSteps:\n1. Verses: 4.\n2. Each: 4.\n3. 4 × 4 = 16."}
{"id": "oth_0066", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "Why protein?", "choices": null, "answer": "Amino acids rebuild trained muscles.", "steps": ["Amino acids rebuild trained muscles.", "So the answer stands: Amino acids rebuild trained muscles."], "text": "Answer: Amino acids rebuild trained muscles.\nSteps:\n1. Amino acids rebuild trained muscles.\n2. So the answer stands: Amino acids rebuild trained muscles."}
{"id": "oth_0067", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "What is latitude?", "choices": null, "answer": "Latitude measures degrees north or south of the equator up to 90.", "steps": ["Latitude measures degrees north or south of the equator up to 90.", "So the answer stands: Latitude measures degrees north or south of the equator up to 90."], "text": "Answer: Latitude measures degrees north or south of the equator up to 90.\nSteps:\n1. Latitude measures degrees north or south of the equator up to 90.\n2. So the answer stands: Latitude measures degrees north or south of the equator up to 90."}
{"id": "oth_0068", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "Why Moon phases?", "choices": null, "answer": "Sunlit halves turn toward us by degrees through each month.", "steps": ["Sunlit halves turn toward us by degrees through each month.", "So the answer stands: Sunlit halves turn toward us by degrees through each month."], "text": "Answer: Sunlit halves turn toward us by degrees through each month.\nSteps:\n1. Sunlit halves turn toward us by degrees through each month.\n2. So the answer stands: Sunlit halves turn toward us by degrees through each month."}
{"id": "oth_0069", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "Pasta needs 2 litre per 100 g. How many litres for 200 g?", "choices": {"A": "3", "B": "4", "C": "5", "D": "6"}, "answer": "Water needed: 4 litres.", "steps": ["200/100 × 2.", "= 4.", "Select option B."], "text": "Answer: 4\nSteps:\n1. 200/100 × 2.\n2. = 4.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0070", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A 250 MB file downloads at 50 MB/s. Compute the seconds.", "choices": null, "answer": "Time: 5 seconds.", "steps": ["250 / 50.", "= 5."], "text": "Answer: Time: 5 seconds.\nSteps:\n1. 250 / 50.\n2. = 5."}
{"id": "oth_0071", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A gallery shows 20 paintings in 5 rooms equally. Count per room.", "choices": null, "answer": "Per room: 4.", "steps": ["Total: 20.", "Rooms: 5.", "20 / 5 = 4."], "text": "Answer: Per room: 4.\nSteps:\n1. Total: 20.\n2. Rooms: 5.\n3. 20 / 5 = 4."}
{"id": "oth_0072", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "What is DOMS?", "choices": null, "answer": "Next-day soreness from novel strain, fading with rest.", "steps": ["Next-day soreness from novel strain, fading with rest.", "So the answer stands: Next-day soreness from novel strain, fading with rest."], "text": "Answer: Next-day soreness from novel strain, fading with rest.\nSteps:\n1. Next-day soreness from novel strain, fading with rest.\n2. So the answer stands: Next-day soreness from novel strain, fading with rest."}
{"id": "oth_0073", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "Why longitude?", "choices": null, "answer": "Longitude counts east or west from Greenwich, timing zones worldwide.", "steps": ["Longitude counts east or west from Greenwich, timing zones worldwide.", "So the answer stands: Longitude counts east or west from Greenwich, timing zones worldwide."], "text": "Answer: Longitude counts east or west from Greenwich, timing zones worldwide.\nSteps:\n1. Longitude counts east or west from Greenwich, timing zones worldwide.\n2. So the answer stands: Longitude counts east or west from Greenwich, timing zones worldwide."}
{"id": "oth_0074", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "What is a comet?", "choices": null, "answer": "Icy bodies sprout glowing tails near the Sun's heat.", "steps": ["Icy bodies sprout glowing tails near the Sun's heat.", "So the answer stands: Icy bodies sprout glowing tails near the Sun's heat."], "text": "Answer: Icy bodies sprout glowing tails near the Sun's heat.\nSteps:\n1. Icy bodies sprout glowing tails near the Sun's heat.\n2. So the answer stands: Icy bodies sprout glowing tails near the Sun's heat."}
{"id": "oth_0075", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "A 3000 mAh battery feeds a 500 mA device. Compute runtime hours.", "choices": null, "answer": "Runtime: 6 hours.", "steps": ["3000 / 500.", "= 6."], "text": "Answer: Runtime: 6 hours.\nSteps:\n1. 3000 / 500.\n2. = 6."}
{"id": "oth_0076", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A photo is 4000×1000 px. Compute the megapixels.", "choices": null, "answer": "Resolution: 4 MP.", "steps": ["4000×1000.", "/1e6.", "= 4."], "text": "Answer: Resolution: 4 MP.\nSteps:\n1. 4000×1000.\n2. /1e6.\n3. = 4."}
{"id": "oth_0077", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A novel has 18 chapters; 3 are read per week. Count the weeks.", "choices": null, "answer": "Weeks: 6.", "steps": ["Chapters: 18.", "Per week: 3.", "18 / 3 = 6."], "text": "Answer: Weeks: 6.\nSteps:\n1. Chapters: 18.\n2. Per week: 3.\n3. 18 / 3 = 6."}
{"id": "oth_0078", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "Max heart rate is 220 − age. How much for age 20?", "choices": {"A": "195 bpm", "B": "205 bpm", "C": "200 bpm", "D": "210 bpm"}, "answer": "Max rate is 200 bpm.", "steps": ["220 − 20.", "= 200.", "Select option C."], "text": "Answer: 200 bpm\nSteps:\n1. 220 − 20.\n2. = 200.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0079", "subject": "other", "topic": "geography", "lang": "cs", "kind": "multiple_choice", "question": "Mapa 1:100000 ukazuje 2 cm. Kolik km je to ve skutečnosti?", "choices": {"A": "1 km", "B": "2 km", "C": "3 km", "D": "4 km"}, "answer": "Skutečná vzdálenost je 2 km.", "steps": ["1 cm = 1 km.", "2 cm = 2 km.", "Vyber možnost B."], "text": "Answer: 2 km\nSteps:\n1. 1 cm = 1 km.\n2. 2 cm = 2 km.\n3. Vyber možnost B.\nAnswer: (B)"}
{"id": "oth_0080", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "A mission lasts 300 days with 4 checkups. Find days per checkup.", "choices": null, "answer": "Days per checkup: 75.", "steps": ["Total 300.", "Checkups 4.", "300 / 4 = 75."], "text": "Answer: Days per checkup: 75.\nSteps:\n1. Total 300.\n2. Checkups 4.\n3. 300 / 4 = 75."}
{"id": "oth_0081", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "A fridge at 25 °C cools 2 °C per hour for 2 h. Find the final temperature.", "choices": null, "answer": "Final temperature: 21 °C.", "steps": ["Drop: 2×2.", "25 − 4.", "= 21 °C."], "text": "Answer: Final temperature: 21 °C.\nSteps:\n1. Drop: 2×2.\n2. 25 − 4.\n3. = 21 °C."}
{"id": "oth_0082", "subject": "other", "topic": "technology", "lang": "cs", "kind": "concept", "question": "Proč komprimovat soubory?", "choices": null, "answer": "Odstranění nadbytečnosti zmenšuje úložiště.", "steps": ["Odstranění nadbytečnosti zmenšuje úložiště.", "Odpověď tedy platí: Odstranění nadbytečnosti zmenšuje úložiště."], "text": "Answer: Odstranění nadbytečnosti zmenšuje úložiště.\nSteps:\n1. Odstranění nadbytečnosti zmenšuje úložiště.\n2. Odpověď tedy platí: Odstranění nadbytečnosti zmenšuje úložiště."}
{"id": "oth_0083", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "Choose: what patterns beats?", "choices": {"A": "Rhyme", "B": "Volume", "C": "Static", "D": "Rhythm"}, "answer": "The answer is Rhythm.", "steps": ["Bodies sway along.", "So: Rhythm.", "Select option D."], "text": "Answer: Rhythm\nSteps:\n1. Bodies sway along.\n2. So: Rhythm.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0084", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "Choose: what heats muscles?", "choices": {"A": "Cool-down", "B": "Lie-down", "C": "Sit-down", "D": "Warm-up"}, "answer": "The answer is Warm-up.", "steps": ["Joints primed safe.", "So: Warm-up.", "Select option D."], "text": "Answer: Warm-up\nSteps:\n1. Joints primed safe.\n2. So: Warm-up.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0085", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "Prague shows 12:00; a city is +3 h ahead. What time is it there?", "choices": {"A": "14:00", "B": "15:00", "C": "16:00", "D": "17:00"}, "answer": "Local time is 15:00.", "steps": ["12 + 3.", "= 15:00.", "Select option B."], "text": "Answer: 15:00\nSteps:\n1. 12 + 3.\n2. = 15:00.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0086", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "A telescope magnifies 30×; the Moon spans 0.5°. Compute apparent width.", "choices": null, "answer": "Apparent width: 15°.", "steps": ["0.5 × 30.", "= 15°."], "text": "Answer: Apparent width: 15°.\nSteps:\n1. 0.5 × 30.\n2. = 15°."}
{"id": "oth_0087", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "Why does ice float?", "choices": null, "answer": "Frozen water expands, growing less dense than liquid.", "steps": ["Frozen water expands, growing less dense than liquid.", "So the answer stands: Frozen water expands, growing less dense than liquid."], "text": "Answer: Frozen water expands, growing less dense than liquid.\nSteps:\n1. Frozen water expands, growing less dense than liquid.\n2. So the answer stands: Frozen water expands, growing less dense than liquid."}
{"id": "oth_0088", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A backup copies 600 GB at 100 GB/h. Compute the hours.", "choices": null, "answer": "Time: 6 hours.", "steps": ["600 / 100.", "= 6."], "text": "Answer: Time: 6 hours.\nSteps:\n1. 600 / 100.\n2. = 6."}
{"id": "oth_0089", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A song has 5 verses of 4 lines. Count all lines.", "choices": null, "answer": "Total: 20.", "steps": ["Verses: 5.", "Each: 4.", "5 × 4 = 20."], "text": "Answer: Total: 20.\nSteps:\n1. Verses: 5.\n2. Each: 4.\n3. 5 × 4 = 20."}
{"id": "oth_0090", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "Choose: what aches next day?", "choices": {"A": "DOMS", "B": "Cramps", "C": "Blisters", "D": "Hiccups"}, "answer": "The answer is DOMS.", "steps": ["Novel strain felt.", "So: DOMS.", "Select option A."], "text": "Answer: DOMS\nSteps:\n1. Novel strain felt.\n2. So: DOMS.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0091", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "What is a watershed?", "choices": null, "answer": "High ground divides river basins, sending rain to different seas.", "steps": ["High ground divides river basins, sending rain to different seas.", "So the answer stands: High ground divides river basins, sending rain to different seas."], "text": "Answer: High ground divides river basins, sending rain to different seas.\nSteps:\n1. High ground divides river basins, sending rain to different seas.\n2. So the answer stands: High ground divides river basins, sending rain to different seas."}
{"id": "oth_0092", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "Sunlight takes 8 min per AU. Compute light time to 5 AU.", "choices": null, "answer": "Light time: 40 min.", "steps": ["Per AU: 8.", "Distance: 5.", "8 × 5 = 40."], "text": "Answer: Light time: 40 min.\nSteps:\n1. Per AU: 8.\n2. Distance: 5.\n3. 8 × 5 = 40."}
{"id": "oth_0093", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "What is pH?", "choices": null, "answer": "It rates acidity from 0 to 14, with 7 neutral.", "steps": ["It rates acidity from 0 to 14, with 7 neutral.", "So the answer stands: It rates acidity from 0 to 14, with 7 neutral."], "text": "Answer: It rates acidity from 0 to 14, with 7 neutral.\nSteps:\n1. It rates acidity from 0 to 14, with 7 neutral.\n2. So the answer stands: It rates acidity from 0 to 14, with 7 neutral."}
{"id": "oth_0094", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A 300 MB file downloads at 50 MB/s. Compute the seconds.", "choices": null, "answer": "Time: 6 seconds.", "steps": ["300 / 50.", "= 6."], "text": "Answer: Time: 6 seconds.\nSteps:\n1. 300 / 50.\n2. = 6."}
{"id": "oth_0095", "subject": "other", "topic": "arts_basics", "lang": "cs", "kind": "multiple_choice", "question": "Píseň má 2 sloky po 4 verších. Kolik veršů celkem?", "choices": {"A": "8", "B": "4", "C": "12", "D": "16"}, "answer": "Celkem veršů: 8.", "steps": ["2 × 4.", "= 8.", "Vyber možnost A."], "text": "Answer: 8\nSteps:\n1. 2 × 4.\n2. = 8.\n3. Vyber možnost A.\nAnswer: (A)"}
{"id": "oth_0096", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "A pool is 50 m; a swimmer does 15 laps. How many metres?", "choices": {"A": "700", "B": "750", "C": "800", "D": "850"}, "answer": "Distance is 750 m.", "steps": ["50 × 15.", "= 750.", "Select option B."], "text": "Answer: 750\nSteps:\n1. 50 × 15.\n2. = 750.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0097", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "Why deltas form?", "choices": null, "answer": "Rivers drop silt where currents slow, building fan lands seaward.", "steps": ["Rivers drop silt where currents slow, building fan lands seaward.", "So the answer stands: Rivers drop silt where currents slow, building fan lands seaward."], "text": "Answer: Rivers drop silt where currents slow, building fan lands seaward.\nSteps:\n1. Rivers drop silt where currents slow, building fan lands seaward.\n2. So the answer stands: Rivers drop silt where currents slow, building fan lands seaward."}
{"id": "oth_0098", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "Why meteor showers?", "choices": null, "answer": "Earth crosses comet dust trails yearly on fixed dates.", "steps": ["Earth crosses comet dust trails yearly on fixed dates.", "So the answer stands: Earth crosses comet dust trails yearly on fixed dates."], "text": "Answer: Earth crosses comet dust trails yearly on fixed dates.\nSteps:\n1. Earth crosses comet dust trails yearly on fixed dates.\n2. So the answer stands: Earth crosses comet dust trails yearly on fixed dates."}
{"id": "oth_0099", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "Pasta needs 2 litre per 100 g. Compute litres for 300 g.", "choices": null, "answer": "Water needed: 6 litres.", "steps": ["300/100 = 3.", "3 × 2.", "= 6."], "text": "Answer: Water needed: 6 litres.\nSteps:\n1. 300/100 = 3.\n2. 3 × 2.\n3. = 6."}
{"id": "oth_0100", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "A photo is 2000×1000 px. How many megapixels?", "choices": {"A": "1", "B": "2", "C": "3", "D": "4"}, "answer": "Resolution is 2 MP.", "steps": ["2000×1000/1e6.", "= 2.", "Select option B."], "text": "Answer: 2\nSteps:\n1. 2000×1000/1e6.\n2. = 2.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0101", "subject": "other", "topic": "arts_basics", "lang": "cs", "kind": "multiple_choice", "question": "Orchestr má 10 smyčců a 8 dechařů. Kolik celkem?", "choices": {"A": "13", "B": "18", "C": "23", "D": "28"}, "answer": "Celkem hudebníků: 18.", "steps": ["10 + 8.", "= 18.", "Vyber možnost B."], "text": "Answer: 18\nSteps:\n1. 10 + 8.\n2. = 18.\n3. Vyber možnost B.\nAnswer: (B)"}
{"id": "oth_0102", "subject": "other", "topic": "sports_science", "lang": "cs", "kind": "concept", "question": "Proč rozcvička?", "choices": null, "answer": "Postupná zátěž zahřívá svaly.", "steps": ["Postupná zátěž zahřívá svaly.", "Odpověď tedy platí: Postupná zátěž zahřívá svaly."], "text": "Answer: Postupná zátěž zahřívá svaly.\nSteps:\n1. Postupná zátěž zahřívá svaly.\n2. Odpověď tedy platí: Postupná zátěž zahřívá svaly."}
{"id": "oth_0103", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "A 1:100000 map shows 3 cm. Convert to real km.", "choices": null, "answer": "Real distance: 3 km.", "steps": ["1 cm = 1 km.", "3 cm.", "= 3 km."], "text": "Answer: Real distance: 3 km.\nSteps:\n1. 1 cm = 1 km.\n2. 3 cm.\n3. = 3 km."}
{"id": "oth_0104", "subject": "other", "topic": "astronomy", "lang": "cs", "kind": "multiple_choice", "question": "Světlo letí 8 minut na AU. Jak dlouho na planetu 2 AU daleko?", "choices": {"A": "16 min", "B": "8 min", "C": "24 min", "D": "32 min"}, "answer": "Doba letu je 16 minut.", "steps": ["8 × 2.", "= 16 minut.", "Vyber možnost A."], "text": "Answer: 16 min\nSteps:\n1. 8 × 2.\n2. = 16 minut.\n3. Vyber možnost A.\nAnswer: (A)"}
{"id": "oth_0105", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "Why soap cleans?", "choices": null, "answer": "Molecules bridge grease and water, lifting dirt away.", "steps": ["Molecules bridge grease and water, lifting dirt away.", "So the answer stands: Molecules bridge grease and water, lifting dirt away."], "text": "Answer: Molecules bridge grease and water, lifting dirt away.\nSteps:\n1. Molecules bridge grease and water, lifting dirt away.\n2. So the answer stands: Molecules bridge grease and water, lifting dirt away."}
{"id": "oth_0106", "subject": "other", "topic": "technology", "lang": "cs", "kind": "worked_example", "question": "Soubor 200 MB se stahuje 50 MB/s. Spočítej sekundy.", "choices": null, "answer": "Čas: 4 sekundy.", "steps": ["200 / 50.", "= 4."], "text": "Answer: Čas: 4 sekundy.\nSteps:\n1. 200 / 50.\n2. = 4."}
{"id": "oth_0107", "subject": "other", "topic": "arts_basics", "lang": "cs", "kind": "concept", "question": "Co je rytmus?", "choices": null, "answer": "Vzorkované doby v čase.", "steps": ["Vzorkované doby v čase.", "Odpověď tedy platí: Vzorkované doby v čase."], "text": "Answer: Vzorkované doby v čase.\nSteps:\n1. Vzorkované doby v čase.\n2. Odpověď tedy platí: Vzorkované doby v čase."}
{"id": "oth_0108", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "A run burns 70 kcal/km over 5 km. How many kcal total?", "choices": {"A": "290", "B": "410", "C": "350", "D": "470"}, "answer": "Energy burned: 350 kcal.", "steps": ["70 × 5.", "= 350.", "Select option C."], "text": "Answer: 350\nSteps:\n1. 70 × 5.\n2. = 350.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0109", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "What is erosion?", "choices": null, "answer": "Water, wind, and ice wear rocks away, sculpting valleys and coasts.", "steps": ["Water, wind, and ice wear rocks away, sculpting valleys and coasts.", "So the answer stands: Water, wind, and ice wear rocks away, sculpting valleys and coasts."], "text": "Answer: Water, wind, and ice wear rocks away, sculpting valleys and coasts.\nSteps:\n1. Water, wind, and ice wear rocks away, sculpting valleys and coasts.\n2. So the answer stands: Water, wind, and ice wear rocks away, sculpting valleys and coasts."}
{"id": "oth_0110", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "What is a black hole?", "choices": null, "answer": "Collapsed mass traps even light behind its horizon.", "steps": ["Collapsed mass traps even light behind its horizon.", "So the answer stands: Collapsed mass traps even light behind its horizon."], "text": "Answer: Collapsed mass traps even light behind its horizon.\nSteps:\n1. Collapsed mass traps even light behind its horizon.\n2. So the answer stands: Collapsed mass traps even light behind its horizon."}
{"id": "oth_0111", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "What is rust?", "choices": null, "answer": "Iron plus oxygen and water form flaky oxide slowly.", "steps": ["Iron plus oxygen and water form flaky oxide slowly.", "So the answer stands: Iron plus oxygen and water form flaky oxide slowly."], "text": "Answer: Iron plus oxygen and water form flaky oxide slowly.\nSteps:\n1. Iron plus oxygen and water form flaky oxide slowly.\n2. So the answer stands: Iron plus oxygen and water form flaky oxide slowly."}
{"id": "oth_0112", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A photo is 5000×1000 px. Compute the megapixels.", "choices": null, "answer": "Resolution: 5 MP.", "steps": ["5000×1000.", "/1e6.", "= 5."], "text": "Answer: Resolution: 5 MP.\nSteps:\n1. 5000×1000.\n2. /1e6.\n3. = 5."}
{"id": "oth_0113", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A gallery shows 25 paintings in 5 rooms equally. Count per room.", "choices": null, "answer": "Per room: 5.", "steps": ["Total: 25.", "Rooms: 5.", "25 / 5 = 5."], "text": "Answer: Per room: 5.\nSteps:\n1. Total: 25.\n2. Rooms: 5.\n3. 25 / 5 = 5."}
{"id": "oth_0114", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "A pool is 50 m; a swimmer does 17 laps. Compute the metres.", "choices": null, "answer": "Distance: 850 m.", "steps": ["50 × 17.", "= 850."], "text": "Answer: Distance: 850 m.\nSteps:\n1. 50 × 17.\n2. = 850."}
{"id": "oth_0115", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "A park of 100 hectares splits into 5 plots. Find one plot's size.", "choices": null, "answer": "One plot: 20 ha.", "steps": ["Total 100.", "Plots 5.", "100 / 5 = 20."], "text": "Answer: One plot: 20 ha.\nSteps:\n1. Total 100.\n2. Plots 5.\n3. 100 / 5 = 20."}
{"id": "oth_0116", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "A mission lasts 400 days with 4 checkups. Find days per checkup.", "choices": null, "answer": "Days per checkup: 100.", "steps": ["Total 400.", "Checkups 4.", "400 / 4 = 100."], "text": "Answer: Days per checkup: 100.\nSteps:\n1. Total 400.\n2. Checkups 4.\n3. 400 / 4 = 100."}
{"id": "oth_0117", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "Why does bread rise?", "choices": null, "answer": "Yeast exhales CO₂ bubbles that puff dough upward.", "steps": ["Yeast exhales CO₂ bubbles that puff dough upward.", "So the answer stands: Yeast exhales CO₂ bubbles that puff dough upward."], "text": "Answer: Yeast exhales CO₂ bubbles that puff dough upward.\nSteps:\n1. Yeast exhales CO₂ bubbles that puff dough upward.\n2. So the answer stands: Yeast exhales CO₂ bubbles that puff dough upward."}
{"id": "oth_0118", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "A screen shows 60 fps for 2 s. How many frames?", "choices": {"A": "90", "B": "150", "C": "120", "D": "180"}, "answer": "Frame count: 120.", "steps": ["60 × 2.", "= 120.", "Select option C."], "text": "Answer: 120\nSteps:\n1. 60 × 2.\n2. = 120.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0119", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "Choose: what marks BPM?", "choices": {"A": "Tempo", "B": "Volume", "C": "Pitch", "D": "Timbre"}, "answer": "The answer is Tempo.", "steps": ["Beats raced steady.", "So: Tempo.", "Select option A."], "text": "Answer: Tempo\nSteps:\n1. Beats raced steady.\n2. So: Tempo.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0120", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "Training burns 350 kcal per session over 3 sessions. Compute total kcal.", "choices": null, "answer": "Total: 1050 kcal.", "steps": ["350 × 3.", "= 1050."], "text": "Answer: Total: 1050 kcal.\nSteps:\n1. 350 × 3.\n2. = 1050."}
{"id": "oth_0121", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "Prague shows 9:00; a city is +4 h ahead. Find the local time.", "choices": null, "answer": "Local time: 13:00.", "steps": ["Base 9.", "Add 4.", "= 13:00."], "text": "Answer: Local time: 13:00.\nSteps:\n1. Base 9.\n2. Add 4.\n3. = 13:00."}
{"id": "oth_0122", "subject": "other", "topic": "astronomy", "lang": "cs", "kind": "concept", "question": "Proč planety obíhají?", "choices": null, "answer": "Gravitace Slunce ohýbá dráhy do elips.", "steps": ["Gravitace Slunce ohýbá dráhy do elips.", "Odpověď tedy platí: Gravitace Slunce ohýbá dráhy do elips."], "text": "Answer: Gravitace Slunce ohýbá dráhy do elips.\nSteps:\n1. Gravitace Slunce ohýbá dráhy do elips.\n2. Odpověď tedy platí: Gravitace Slunce ohýbá dráhy do elips."}
{"id": "oth_0123", "subject": "other", "topic": "everyday_science", "lang": "cs", "kind": "concept", "question": "Proč voda vře?", "choices": null, "answer": "Tlak par se vyrovná vzduchu při 100 °C.", "steps": ["Tlak par se vyrovná vzduchu při 100 °C.", "Odpověď tedy platí: Tlak par se vyrovná vzduchu při 100 °C."], "text": "Answer: Tlak par se vyrovná vzduchu při 100 °C.\nSteps:\n1. Tlak par se vyrovná vzduchu při 100 °C.\n2. Odpověď tedy platí: Tlak par se vyrovná vzduchu při 100 °C."}
{"id": "oth_0124", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A backup copies 700 GB at 100 GB/h. Compute the hours.", "choices": null, "answer": "Time: 7 hours.", "steps": ["700 / 100.", "= 7."], "text": "Answer: Time: 7 hours.\nSteps:\n1. 700 / 100.\n2. = 7."}
{"id": "oth_0125", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "What is perspective?", "choices": null, "answer": "Techniques that fake depth on flat canvas.", "steps": ["Techniques that fake depth on flat canvas.", "So the answer stands: Techniques that fake depth on flat canvas."], "text": "Answer: Techniques that fake depth on flat canvas.\nSteps:\n1. Techniques that fake depth on flat canvas.\n2. So the answer stands: Techniques that fake depth on flat canvas."}
{"id": "oth_0126", "subject": "other", "topic": "sports_science", "lang": "cs", "kind": "multiple_choice", "question": "Běh spaluje 60 kcal/km na 5 km. Kolik kcal celkem?", "choices": {"A": "240", "B": "300", "C": "360", "D": "420"}, "answer": "Energie: 300 kcal.", "steps": ["60 × 5.", "= 300.", "Vyber možnost B."], "text": "Answer: 300\nSteps:\n1. 60 × 5.\n2. = 300.\n3. Vyber možnost B.\nAnswer: (B)"}
{"id": "oth_0127", "subject": "other", "topic": "geography", "lang": "cs", "kind": "worked_example", "question": "Mapa 1:100000 ukazuje 3 cm. Převeď na skutečné km.", "choices": null, "answer": "Skutečnost: 3 km.", "steps": ["1 cm = 1 km.", "3 cm.", "= 3 km."], "text": "Answer: Skutečnost: 3 km.\nSteps:\n1. 1 cm = 1 km.\n2. 3 cm.\n3. = 3 km."}
{"id": "oth_0128", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "Choose: what spans 9.5 trillion km?", "choices": {"A": "Light snack", "B": "Light nap", "C": "Light joke", "D": "Light-year"}, "answer": "The answer is Light-year.", "steps": ["Year of light travel.", "So: Light-year.", "Select option D."], "text": "Answer: Light-year\nSteps:\n1. Year of light travel.\n2. So: Light-year.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0129", "subject": "other", "topic": "everyday_science", "lang": "cs", "kind": "concept", "question": "Co je kondenzace?", "choices": null, "answer": "Chladnoucí pára kapalní na studených plochách.", "steps": ["Chladnoucí pára kapalní na studených plochách.", "Odpověď tedy platí: Chladnoucí pára kapalní na studených plochách."], "text": "Answer: Chladnoucí pára kapalní na studených plochách.\nSteps:\n1. Chladnoucí pára kapalní na studených plochách.\n2. Odpověď tedy platí: Chladnoucí pára kapalní na studených plochách."}
{"id": "oth_0130", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "Choose: what sizes streams?", "choices": {"A": "Voltage", "B": "Weight", "C": "Length", "D": "Bandwidth"}, "answer": "The answer is Bandwidth.", "steps": ["Bits per second.", "So: Bandwidth.", "Select option D."], "text": "Answer: Bandwidth\nSteps:\n1. Bits per second.\n2. So: Bandwidth.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0131", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "Why primary colours?", "choices": null, "answer": "Red, blue, yellow mix into wide palettes.", "steps": ["Red, blue, yellow mix into wide palettes.", "So the answer stands: Red, blue, yellow mix into wide palettes."], "text": "Answer: Red, blue, yellow mix into wide palettes.\nSteps:\n1. Red, blue, yellow mix into wide palettes.\n2. So the answer stands: Red, blue, yellow mix into wide palettes."}
{"id": "oth_0132", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "Max heart rate is 220 − age. Compute it for age 30.", "choices": null, "answer": "Max rate: 190 bpm.", "steps": ["220 − 30.", "= 190."], "text": "Answer: Max rate: 190 bpm.\nSteps:\n1. 220 − 30.\n2. = 190."}
{"id": "oth_0133", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "Why earthquakes?", "choices": null, "answer": "Stuck plates snap past each other, shaking ground along faults.", "steps": ["Stuck plates snap past each other, shaking ground along faults.", "So the answer stands: Stuck plates snap past each other, shaking ground along faults."], "text": "Answer: Stuck plates snap past each other, shaking ground along faults.\nSteps:\n1. Stuck plates snap past each other, shaking ground along faults.\n2. So the answer stands: Stuck plates snap past each other, shaking ground along faults."}
{"id": "oth_0134", "subject": "other", "topic": "astronomy", "lang": "cs", "kind": "worked_example", "question": "Světlo letí 8 minut na AU. Spočítej dobu letu na 3 AU.", "choices": null, "answer": "Doba letu: 24 minut.", "steps": ["Na AU: 8.", "Vzdálenost: 3.", "8 × 3 = 24."], "text": "Answer: Doba letu: 24 minut.\nSteps:\n1. Na AU: 8.\n2. Vzdálenost: 3.\n3. 8 × 3 = 24."}
{"id": "oth_0135", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "A 4000 mAh battery feeds a 500 mA device. Compute runtime hours.", "choices": null, "answer": "Runtime: 8 hours.", "steps": ["4000 / 500.", "= 8."], "text": "Answer: Runtime: 8 hours.\nSteps:\n1. 4000 / 500.\n2. = 8."}
{"id": "oth_0136", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "Why SSDs fast?", "choices": null, "answer": "No moving parts means instant chip reads.", "steps": ["No moving parts means instant chip reads.", "So the answer stands: No moving parts means instant chip reads."], "text": "Answer: No moving parts means instant chip reads.\nSteps:\n1. No moving parts means instant chip reads.\n2. So the answer stands: No moving parts means instant chip reads."}
{"id": "oth_0137", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "A song has 3 verses of 4 lines. How many lines total?", "choices": {"A": "8", "B": "12", "C": "16", "D": "20"}, "answer": "Total lines: 12.", "steps": ["3 × 4.", "= 12.", "Select option B."], "text": "Answer: 12\nSteps:\n1. 3 × 4.\n2. = 12.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0138", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "Max heart rate is 220 − age. How much for age 25?", "choices": {"A": "190 bpm", "B": "200 bpm", "C": "205 bpm", "D": "195 bpm"}, "answer": "Max rate is 195 bpm.", "steps": ["220 − 25.", "= 195.", "Select option D."], "text": "Answer: 195 bpm\nSteps:\n1. 220 − 25.\n2. = 195.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0139", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "What is the Ring of Fire?", "choices": null, "answer": "Pacific plate edges host most volcanoes and quakes on Earth.", "steps": ["Pacific plate edges host most volcanoes and quakes on Earth.", "So the answer stands: Pacific plate edges host most volcanoes and quakes on Earth."], "text": "Answer: Pacific plate edges host most volcanoes and quakes on Earth.\nSteps:\n1. Pacific plate edges host most volcanoes and quakes on Earth.\n2. So the answer stands: Pacific plate edges host most volcanoes and quakes on Earth."}
{"id": "oth_0140", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "Choose: what fuses cores?", "choices": {"A": "Stars", "B": "Planets", "C": "Moons", "D": "Rocks"}, "answer": "The answer is Stars.", "steps": ["Mass turns light.", "So: Stars.", "Select option A."], "text": "Answer: Stars\nSteps:\n1. Mass turns light.\n2. So: Stars.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0141", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "What is pasteurization?", "choices": null, "answer": "Brief heating kills germs while sparing flavour mostly.", "steps": ["Brief heating kills germs while sparing flavour mostly.", "So the answer stands: Brief heating kills germs while sparing flavour mostly."], "text": "Answer: Brief heating kills germs while sparing flavour mostly.\nSteps:\n1. Brief heating kills germs while sparing flavour mostly.\n2. So the answer stands: Brief heating kills germs while sparing flavour mostly."}
{"id": "oth_0142", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "What is encryption?", "choices": null, "answer": "Math scrambles data readable only with keys.", "steps": ["Math scrambles data readable only with keys.", "So the answer stands: Math scrambles data readable only with keys."], "text": "Answer: Math scrambles data readable only with keys.\nSteps:\n1. Math scrambles data readable only with keys.\n2. So the answer stands: Math scrambles data readable only with keys."}
{"id": "oth_0143", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "An orchestra has 15 strings and 8 wind players. How many total?", "choices": {"A": "18", "B": "28", "C": "23", "D": "33"}, "answer": "Total players: 23.", "steps": ["15 + 8.", "= 23.", "Select option C."], "text": "Answer: 23\nSteps:\n1. 15 + 8.\n2. = 23.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0144", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "A pool is 50 m; a swimmer does 22 laps. Compute the metres.", "choices": null, "answer": "Distance: 1100 m.", "steps": ["50 × 22.", "= 1100."], "text": "Answer: Distance: 1100 m.\nSteps:\n1. 50 × 22.\n2. = 1100."}
{"id": "oth_0145", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "A 1:100000 map shows 4 cm. Convert to real km.", "choices": null, "answer": "Real distance: 4 km.", "steps": ["1 cm = 1 km.", "4 cm.", "= 4 km."], "text": "Answer: Real distance: 4 km.\nSteps:\n1. 1 cm = 1 km.\n2. 4 cm.\n3. = 4 km."}
{"id": "oth_0146", "subject": "other", "topic": "astronomy", "lang": "cs", "kind": "worked_example", "question": "Mise trvá 200 dní se 4 kontrolami. Zjisti dní na kontrolu.", "choices": null, "answer": "Dní na kontrolu: 50.", "steps": ["Celkem 200.", "Kontrol 4.", "200 / 4 = 50."], "text": "Answer: Dní na kontrolu: 50.\nSteps:\n1. Celkem 200.\n2. Kontrol 4.\n3. 200 / 4 = 50."}
{"id": "oth_0147", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "A 3000 mAh battery feeds a 500 mA device. How many hours?", "choices": {"A": "5", "B": "7", "C": "6", "D": "8"}, "answer": "Runtime is 6 hours.", "steps": ["3000 / 500.", "= 6.", "Select option C."], "text": "Answer: 6\nSteps:\n1. 3000 / 500.\n2. = 6.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0148", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "Choose: what survives disk death?", "choices": {"A": "Backups", "B": "Cables", "C": "Stickers", "D": "Boxes"}, "answer": "The answer is Backups.", "steps": ["Copies restored.", "So: Backups.", "Select option A."], "text": "Answer: Backups\nSteps:\n1. Copies restored.\n2. So: Backups.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0149", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A novel has 21 chapters; 3 are read per week. Count the weeks.", "choices": null, "answer": "Weeks: 7.", "steps": ["Chapters: 21.", "Per week: 3.", "21 / 3 = 7."], "text": "Answer: Weeks: 7.\nSteps:\n1. Chapters: 21.\n2. Per week: 3.\n3. 21 / 3 = 7."}
{"id": "oth_0150", "subject": "other", "topic": "sports_science", "lang": "cs", "kind": "worked_example", "question": "Bazén měří 50 m; plavec dá 12 délek. Spočítej metry.", "choices": null, "answer": "Vzdálenost: 600 m.", "steps": ["50 × 12.", "= 600."], "text": "Answer: Vzdálenost: 600 m.\nSteps:\n1. 50 × 12.\n2. = 600."}
{"id": "oth_0151", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "A park of 150 hectares splits into 5 plots. Find one plot's size.", "choices": null, "answer": "One plot: 30 ha.", "steps": ["Total 150.", "Plots 5.", "150 / 5 = 30."], "text": "Answer: One plot: 30 ha.\nSteps:\n1. Total 150.\n2. Plots 5.\n3. 150 / 5 = 30."}
{"id": "oth_0152", "subject": "other", "topic": "astronomy", "lang": "cs", "kind": "multiple_choice", "question": "Rok planety je 100 dní. Kolik dní jsou 2 oběhy?", "choices": {"A": "100 days", "B": "200 days", "C": "300 days", "D": "400 days"}, "answer": "Dva oběhy trvají 200 dní.", "steps": ["2 × 100.", "= 200.", "Vyber možnost B."], "text": "Answer: 200 days\nSteps:\n1. 2 × 100.\n2. = 200.\n3. Vyber možnost B.\nAnswer: (B)"}
{"id": "oth_0153", "subject": "other", "topic": "everyday_science", "lang": "cs", "kind": "worked_example", "question": "Baterie 3000 mAh krmí zařízení 500 mA. Spočítej hodiny výdrže.", "choices": null, "answer": "Výdrž: 6 hodin.", "steps": ["3000 / 500.", "= 6."], "text": "Answer: Výdrž: 6 hodin.\nSteps:\n1. 3000 / 500.\n2. = 6."}
{"id": "oth_0154", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A 350 MB file downloads at 50 MB/s. Compute the seconds.", "choices": null, "answer": "Time: 7 seconds.", "steps": ["350 / 50.", "= 7."], "text": "Answer: Time: 7 seconds.\nSteps:\n1. 350 / 50.\n2. = 7."}
{"id": "oth_0155", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "What is a sonnet?", "choices": null, "answer": "Fourteen lines with strict rhyme and turn.", "steps": ["Fourteen lines with strict rhyme and turn.", "So the answer stands: Fourteen lines with strict rhyme and turn."], "text": "Answer: Fourteen lines with strict rhyme and turn.\nSteps:\n1. Fourteen lines with strict rhyme and turn.\n2. So the answer stands: Fourteen lines with strict rhyme and turn."}
{"id": "oth_0156", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "Why sleep for sport?", "choices": null, "answer": "Deep rest consolidates skill and restores tissue.", "steps": ["Deep rest consolidates skill and restores tissue.", "So the answer stands: Deep rest consolidates skill and restores tissue."], "text": "Answer: Deep rest consolidates skill and restores tissue.\nSteps:\n1. Deep rest consolidates skill and restores tissue.\n2. So the answer stands: Deep rest consolidates skill and restores tissue."}
{"id": "oth_0157", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "Prague shows 9:00; a city is +5 h ahead. Find the local time.", "choices": null, "answer": "Local time: 14:00.", "steps": ["Base 9.", "Add 5.", "= 14:00."], "text": "Answer: Local time: 14:00.\nSteps:\n1. Base 9.\n2. Add 5.\n3. = 14:00."}
{"id": "oth_0158", "subject": "other", "topic": "astronomy", "lang": "cs", "kind": "multiple_choice", "question": "Dalekohled zvětšuje 10×; Měsíc měří 0,5°. Jak široký se zdá?", "choices": {"A": "0°", "B": "10°", "C": "5°", "D": "15°"}, "answer": "Zdánlivá šířka je 5°.", "steps": ["0,5 × 10.", "= 5°.", "Vyber možnost C."], "text": "Answer: 5°\nSteps:\n1. 0,5 × 10.\n2. = 5°.\n3. Vyber možnost C.\nAnswer: (C)"}
{"id": "oth_0159", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "A fridge at 25 °C cools 3 °C per hour for 2 h. Find the final temperature.", "choices": null, "answer": "Final temperature: 19 °C.", "steps": ["Drop: 3×2.", "25 − 6.", "= 19 °C."], "text": "Answer: Final temperature: 19 °C.\nSteps:\n1. Drop: 3×2.\n2. 25 − 6.\n3. = 19 °C."}
{"id": "oth_0160", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "Why backups?", "choices": null, "answer": "Copies survive disk death, theft, and ransomware.", "steps": ["Copies survive disk death, theft, and ransomware.", "So the answer stands: Copies survive disk death, theft, and ransomware."], "text": "Answer: Copies survive disk death, theft, and ransomware.\nSteps:\n1. Copies survive disk death, theft, and ransomware.\n2. So the answer stands: Copies survive disk death, theft, and ransomware."}
{"id": "oth_0161", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "A novel has 15 chapters; 3 are read per week. How many weeks?", "choices": {"A": "4", "B": "6", "C": "7", "D": "5"}, "answer": "Reading takes 5 weeks.", "steps": ["15 / 3.", "= 5.", "Select option D."], "text": "Answer: 5\nSteps:\n1. 15 / 3.\n2. = 5.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0162", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "Training burns 400 kcal per session over 3 sessions. Compute total kcal.", "choices": null, "answer": "Total: 1200 kcal.", "steps": ["400 × 3.", "= 1200."], "text": "Answer: Total: 1200 kcal.\nSteps:\n1. 400 × 3.\n2. = 1200."}
{"id": "oth_0163", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "A 1:100000 map shows 5 cm. Convert to real km.", "choices": null, "answer": "Real distance: 5 km.", "steps": ["1 cm = 1 km.", "5 cm.", "= 5 km."], "text": "Answer: Real distance: 5 km.\nSteps:\n1. 1 cm = 1 km.\n2. 5 cm.\n3. = 5 km."}
{"id": "oth_0164", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "Sunlight takes 8 min per AU. How long to a planet at 3 AU?", "choices": {"A": "16 min", "B": "24 min", "C": "32 min", "D": "40 min"}, "answer": "Light time is 24 min.", "steps": ["8 × 3.", "= 24 min.", "Select option B."], "text": "Answer: 24 min\nSteps:\n1. 8 × 3.\n2. = 24 min.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0165", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "Why does salt melt ice?", "choices": null, "answer": "It lowers freezing point, turning ice to water below 0 °C.", "steps": ["It lowers freezing point, turning ice to water below 0 °C.", "So the answer stands: It lowers freezing point, turning ice to water below 0 °C."], "text": "Answer: It lowers freezing point, turning ice to water below 0 °C.\nSteps:\n1. It lowers freezing point, turning ice to water below 0 °C.\n2. So the answer stands: It lowers freezing point, turning ice to water below 0 °C."}
{"id": "oth_0166", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A photo is 6000×1000 px. Compute the megapixels.", "choices": null, "answer": "Resolution: 6 MP.", "steps": ["6000×1000.", "/1e6.", "= 6."], "text": "Answer: Resolution: 6 MP.\nSteps:\n1. 6000×1000.\n2. /1e6.\n3. = 6."}
{"id": "oth_0167", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "Why museums?", "choices": null, "answer": "They preserve and explain shared heritage publicly.", "steps": ["They preserve and explain shared heritage publicly.", "So the answer stands: They preserve and explain shared heritage publicly."], "text": "Answer: They preserve and explain shared heritage publicly.\nSteps:\n1. They preserve and explain shared heritage publicly.\n2. So the answer stands: They preserve and explain shared heritage publicly."}
{"id": "oth_0168", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "What is pacing?", "choices": null, "answer": "Even effort distribution wins endurance races.", "steps": ["Even effort distribution wins endurance races.", "So the answer stands: Even effort distribution wins endurance races."], "text": "Answer: Even effort distribution wins endurance races.\nSteps:\n1. Even effort distribution wins endurance races.\n2. So the answer stands: Even effort distribution wins endurance races."}
{"id": "oth_0169", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "Why seasons?", "choices": null, "answer": "Tilted axis aims hemispheres at the Sun alternately through the year.", "steps": ["Tilted axis aims hemispheres at the Sun alternately through the year.", "So the answer stands: Tilted axis aims hemispheres at the Sun alternately through the year."], "text": "Answer: Tilted axis aims hemispheres at the Sun alternately through the year.\nSteps:\n1. Tilted axis aims hemispheres at the Sun alternately through the year.\n2. So the answer stands: Tilted axis aims hemispheres at the Sun alternately through the year."}
{"id": "oth_0170", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "Why stars shine?", "choices": null, "answer": "Fusion in cores turns mass into light steadily.", "steps": ["Fusion in cores turns mass into light steadily.", "So the answer stands: Fusion in cores turns mass into light steadily."], "text": "Answer: Fusion in cores turns mass into light steadily.\nSteps:\n1. Fusion in cores turns mass into light steadily.\n2. So the answer stands: Fusion in cores turns mass into light steadily."}
{"id": "oth_0171", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "Pasta needs 3 litre per 100 g. Compute litres for 300 g.", "choices": null, "answer": "Water needed: 9 litres.", "steps": ["300/100 = 3.", "3 × 3.", "= 9."], "text": "Answer: Water needed: 9 litres.\nSteps:\n1. 300/100 = 3.\n2. 3 × 3.\n3. = 9."}
{"id": "oth_0172", "subject": "other", "topic": "technology", "lang": "cs", "kind": "multiple_choice", "question": "Fotka měří 2000×1000 px. Kolik megapixelů?", "choices": {"A": "1", "B": "2", "C": "3", "D": "4"}, "answer": "Rozlišení je 2 megapixely.", "steps": ["2000×1000/1e6.", "= 2.", "Vyber možnost B."], "text": "Answer: 2\nSteps:\n1. 2000×1000/1e6.\n2. = 2.\n3. Vyber možnost B.\nAnswer: (B)"}
{"id": "oth_0173", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A song has 6 verses of 4 lines. Count all lines.", "choices": null, "answer": "Total: 24.", "steps": ["Verses: 6.", "Each: 4.", "6 × 4 = 24."], "text": "Answer: Total: 24.\nSteps:\n1. Verses: 6.\n2. Each: 4.\n3. 6 × 4 = 24."}
{"id": "oth_0174", "subject": "other", "topic": "sports_science", "lang": "cs", "kind": "concept", "question": "Co je VO2max?", "choices": null, "answer": "Vrcholná spotřeba kyslíku.", "steps": ["Vrcholná spotřeba kyslíku.", "Odpověď tedy platí: Vrcholná spotřeba kyslíku."], "text": "Answer: Vrcholná spotřeba kyslíku.\nSteps:\n1. Vrcholná spotřeba kyslíku.\n2. Odpověď tedy platí: Vrcholná spotřeba kyslíku."}
{"id": "oth_0175", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "A 1:100000 map shows 3 cm. How many km is that really?", "choices": {"A": "2 km", "B": "4 km", "C": "3 km", "D": "5 km"}, "answer": "Real distance is 3 km.", "steps": ["1 cm = 1 km.", "3 cm = 3 km.", "Select option C."], "text": "Answer: 3 km\nSteps:\n1. 1 cm = 1 km.\n2. 3 cm = 3 km.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0176", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "What is a galaxy?", "choices": null, "answer": "Billions of stars bound by gravity into spirals and blobs.", "steps": ["Billions of stars bound by gravity into spirals and blobs.", "So the answer stands: Billions of stars bound by gravity into spirals and blobs."], "text": "Answer: Billions of stars bound by gravity into spirals and blobs.\nSteps:\n1. Billions of stars bound by gravity into spirals and blobs.\n2. So the answer stands: Billions of stars bound by gravity into spirals and blobs."}
{"id": "oth_0177", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "What is humidity?", "choices": null, "answer": "Airborne water share, high before rain and storms.", "steps": ["Airborne water share, high before rain and storms.", "So the answer stands: Airborne water share, high before rain and storms."], "text": "Answer: Airborne water share, high before rain and storms.\nSteps:\n1. Airborne water share, high before rain and storms.\n2. So the answer stands: Airborne water share, high before rain and storms."}
{"id": "oth_0178", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "What is open source?", "choices": null, "answer": "Public code anyone may read, fix, and share.", "steps": ["Public code anyone may read, fix, and share.", "So the answer stands: Public code anyone may read, fix, and share."], "text": "Answer: Public code anyone may read, fix, and share.\nSteps:\n1. Public code anyone may read, fix, and share.\n2. So the answer stands: Public code anyone may read, fix, and share."}
{"id": "oth_0179", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "What is tempo?", "choices": null, "answer": "Speed of beats in music, marked BPM.", "steps": ["Speed of beats in music, marked BPM.", "So the answer stands: Speed of beats in music, marked BPM."], "text": "Answer: Speed of beats in music, marked BPM.\nSteps:\n1. Speed of beats in music, marked BPM.\n2. So the answer stands: Speed of beats in music, marked BPM."}
{"id": "oth_0180", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "Choose: what rates endurance?", "choices": {"A": "VO2max", "B": "BMI", "C": "IQ", "D": "RPM"}, "answer": "The answer is VO2max.", "steps": ["Oxygen peaked.", "So: VO2max.", "Select option A."], "text": "Answer: VO2max\nSteps:\n1. Oxygen peaked.\n2. So: VO2max.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0181", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "A park of 200 hectares splits into 5 plots. Find one plot's size.", "choices": null, "answer": "One plot: 40 ha.", "steps": ["Total 200.", "Plots 5.", "200 / 5 = 40."], "text": "Answer: One plot: 40 ha.\nSteps:\n1. Total 200.\n2. Plots 5.\n3. 200 / 5 = 40."}
{"id": "oth_0182", "subject": "other", "topic": "astronomy", "lang": "cs", "kind": "worked_example", "question": "Dalekohled zvětšuje 20×; Měsíc měří 0,5°. Spočítej zdánlivou šířku.", "choices": null, "answer": "Zdánlivá šířka: 10°.", "steps": ["0,5 × 20.", "= 10°."], "text": "Answer: Zdánlivá šířka: 10°.\nSteps:\n1. 0,5 × 20.\n2. = 10°."}
{"id": "oth_0183", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "A 5000 mAh battery feeds a 500 mA device. Compute runtime hours.", "choices": null, "answer": "Runtime: 10 hours.", "steps": ["5000 / 500.", "= 10."], "text": "Answer: Runtime: 10 hours.\nSteps:\n1. 5000 / 500.\n2. = 10."}
{"id": "oth_0184", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "Why updates?", "choices": null, "answer": "Patches close security holes and fix bugs.", "steps": ["Patches close security holes and fix bugs.", "So the answer stands: Patches close security holes and fix bugs."], "text": "Answer: Patches close security holes and fix bugs.\nSteps:\n1. Patches close security holes and fix bugs.\n2. So the answer stands: Patches close security holes and fix bugs."}
{"id": "oth_0185", "subject": "other", "topic": "arts_basics", "lang": "cs", "kind": "concept", "question": "Proč harmonie?", "choices": null, "answer": "Vrstvené tóny splývají do akordů.", "steps": ["Vrstvené tóny splývají do akordů.", "Odpověď tedy platí: Vrstvené tóny splývají do akordů."], "text": "Answer: Vrstvené tóny splývají do akordů.\nSteps:\n1. Vrstvené tóny splývají do akordů.\n2. Odpověď tedy platí: Vrstvené tóny splývají do akordů."}
{"id": "oth_0186", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "Max heart rate is 220 − age. Compute it for age 35.", "choices": null, "answer": "Max rate: 185 bpm.", "steps": ["220 − 35.", "= 185."], "text": "Answer: Max rate: 185 bpm.\nSteps:\n1. 220 − 35.\n2. = 185."}
{"id": "oth_0187", "subject": "other", "topic": "geography", "lang": "cs", "kind": "multiple_choice", "question": "Země 6 milionů lidí má 3 regiony. Kolik milionů na region?", "choices": {"A": "1", "B": "3", "C": "2", "D": "4"}, "answer": "Na region: 2 miliony.", "steps": ["6 / 3.", "= 2.", "Vyber možnost C."], "text": "Answer: 2\nSteps:\n1. 6 / 3.\n2. = 2.\n3. Vyber možnost C.\nAnswer: (C)"}
{"id": "oth_0188", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "A planet's year is 150 days. How many days are 2 orbits?", "choices": {"A": "150 days", "B": "450 days", "C": "300 days", "D": "600 days"}, "answer": "Two orbits take 300 days.", "steps": ["2 × 150.", "= 300.", "Select option C."], "text": "Answer: 300 days\nSteps:\n1. 2 × 150.\n2. = 300.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0189", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "A fridge at 25 °C cools 4 °C per hour for 2 h. Find the final temperature.", "choices": null, "answer": "Final temperature: 17 °C.", "steps": ["Drop: 4×2.", "25 − 8.", "= 17 °C."], "text": "Answer: Final temperature: 17 °C.\nSteps:\n1. Drop: 4×2.\n2. 25 − 8.\n3. = 17 °C."}
{"id": "oth_0190", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "A 150 MB file downloads at 50 MB/s. How many seconds?", "choices": {"A": "2", "B": "3", "C": "4", "D": "5"}, "answer": "Download takes 3 seconds.", "steps": ["150 / 50.", "= 3.", "Select option B."], "text": "Answer: 3\nSteps:\n1. 150 / 50.\n2. = 3.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0191", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "Why rehearsals?", "choices": null, "answer": "Repeated practice aligns ensembles tightly.", "steps": ["Repeated practice aligns ensembles tightly.", "So the answer stands: Repeated practice aligns ensembles tightly."], "text": "Answer: Repeated practice aligns ensembles tightly.\nSteps:\n1. Repeated practice aligns ensembles tightly.\n2. So the answer stands: Repeated practice aligns ensembles tightly."}
{"id": "oth_0192", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "A pool is 50 m; a swimmer does 27 laps. Compute the metres.", "choices": null, "answer": "Distance: 1350 m.", "steps": ["50 × 27.", "= 1350."], "text": "Answer: Distance: 1350 m.\nSteps:\n1. 50 × 27.\n2. = 1350."}
{"id": "oth_0193", "subject": "other", "topic": "geography", "lang": "cs", "kind": "concept", "question": "Proč měřítka map?", "choices": null, "answer": "Měřítka zmenšují země na papír.", "steps": ["Měřítka zmenšují země na papír.", "Odpověď tedy platí: Měřítka zmenšují země na papír."], "text": "Answer: Měřítka zmenšují země na papír.\nSteps:\n1. Měřítka zmenšují země na papír.\n2. Odpověď tedy platí: Měřítka zmenšují země na papír."}
{"id": "oth_0194", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "A telescope magnifies 20×; the Moon spans 0.5°. How wide does it appear?", "choices": {"A": "5°", "B": "15°", "C": "20°", "D": "10°"}, "answer": "Apparent width is 10°.", "steps": ["0.5 × 20.", "= 10°.", "Select option D."], "text": "Answer: 10°\nSteps:\n1. 0.5 × 20.\n2. = 10°.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0195", "subject": "other", "topic": "everyday_science", "lang": "cs", "kind": "worked_example", "question": "Lednice 25 °C chladí 2 °C za hodinu po 2 h. Zjisti konečnou teplotu.", "choices": null, "answer": "Konečná teplota: 21 °C.", "steps": ["Pokles: 2×2.", "25 − 4.", "= 21 °C."], "text": "Answer: Konečná teplota: 21 °C.\nSteps:\n1. Pokles: 2×2.\n2. 25 − 4.\n3. = 21 °C."}
{"id": "oth_0196", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "A photo is 3000×1000 px. How many megapixels?", "choices": {"A": "2", "B": "4", "C": "3", "D": "5"}, "answer": "Resolution is 3 MP.", "steps": ["3000×1000/1e6.", "= 3.", "Select option C."], "text": "Answer: 3\nSteps:\n1. 3000×1000/1e6.\n2. = 3.\n3. Select option C.\nAnswer: (C)"}
{"id": "oth_0197", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A gallery shows 30 paintings in 5 rooms equally. Count per room.", "choices": null, "answer": "Per room: 6.", "steps": ["Total: 30.", "Rooms: 5.", "30 / 5 = 6."], "text": "Answer: Per room: 6.\nSteps:\n1. Total: 30.\n2. Rooms: 5.\n3. 30 / 5 = 6."}
{"id": "oth_0198", "subject": "other", "topic": "sports_science", "lang": "cs", "kind": "worked_example", "question": "Trénink spaluje 300 kcal za lekci ve 3 lekcích. Spočítej celkové kcal.", "choices": null, "answer": "Celkem: 900 kcal.", "steps": ["300 × 3.", "= 900."], "text": "Answer: Celkem: 900 kcal.\nSteps:\n1. 300 × 3.\n2. = 900."}
{"id": "oth_0199", "subject": "other", "topic": "geography", "lang": "cs", "kind": "worked_example", "question": "Park 100 hektarů se dělí na 5 dílů. Zjisti velikost jednoho dílu.", "choices": null, "answer": "Jeden díl: 20 ha.", "steps": ["Celkem 100.", "Dílů 5.", "100 / 5 = 20."], "text": "Answer: Jeden díl: 20 ha.\nSteps:\n1. Celkem 100.\n2. Dílů 5.\n3. 100 / 5 = 20."}
{"id": "oth_0200", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "Choose: what blocks the Sun?", "choices": {"A": "The Moon", "B": "Mars", "C": "Venus", "D": "Comet"}, "answer": "The answer is The Moon.", "steps": ["Shadow races day.", "So: The Moon.", "Select option A."], "text": "Answer: The Moon\nSteps:\n1. Shadow races day.\n2. So: The Moon.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0201", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "Why does thunder lag?", "choices": null, "answer": "Light outruns sound vastly, so delay measures storm distance.", "steps": ["Light outruns sound vastly, so delay measures storm distance.", "So the answer stands: Light outruns sound vastly, so delay measures storm distance."], "text": "Answer: Light outruns sound vastly, so delay measures storm distance.\nSteps:\n1. Light outruns sound vastly, so delay measures storm distance.\n2. So the answer stands: Light outruns sound vastly, so delay measures storm distance."}
{"id": "oth_0202", "subject": "other", "topic": "technology", "lang": "cs", "kind": "worked_example", "question": "Fotka měří 3000×1000 px. Spočítej megapixely.", "choices": null, "answer": "Rozlišení: 3 megapixely.", "steps": ["3000×1000.", "/1e6.", "= 3."], "text": "Answer: Rozlišení: 3 megapixely.\nSteps:\n1. 3000×1000.\n2. /1e6.\n3. = 3."}
{"id": "oth_0203", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "What is genre?", "choices": null, "answer": "Shared conventions grouping stories and songs.", "steps": ["Shared conventions grouping stories and songs.", "So the answer stands: Shared conventions grouping stories and songs."], "text": "Answer: Shared conventions grouping stories and songs.\nSteps:\n1. Shared conventions grouping stories and songs.\n2. So the answer stands: Shared conventions grouping stories and songs."}
{"id": "oth_0204", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "Why strength training?", "choices": null, "answer": "Loaded reps raise force and bone density.", "steps": ["Loaded reps raise force and bone density.", "So the answer stands: Loaded reps raise force and bone density."], "text": "Answer: Loaded reps raise force and bone density.\nSteps:\n1. Loaded reps raise force and bone density.\n2. So the answer stands: Loaded reps raise force and bone density."}
{"id": "oth_0205", "subject": "other", "topic": "geography", "lang": "cs", "kind": "concept", "question": "Co je šířka?", "choices": null, "answer": "Zeměpisná šířka měří stupně od rovníku.", "steps": ["Zeměpisná šířka měří stupně od rovníku.", "Odpověď tedy platí: Zeměpisná šířka měří stupně od rovníku."], "text": "Answer: Zeměpisná šířka měří stupně od rovníku.\nSteps:\n1. Zeměpisná šířka měří stupně od rovníku.\n2. Odpověď tedy platí: Zeměpisná šířka měří stupně od rovníku."}
{"id": "oth_0206", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "Why redshift?", "choices": null, "answer": "Expanding space stretches light waves longer and redder.", "steps": ["Expanding space stretches light waves longer and redder.", "So the answer stands: Expanding space stretches light waves longer and redder."], "text": "Answer: Expanding space stretches light waves longer and redder.\nSteps:\n1. Expanding space stretches light waves longer and redder.\n2. So the answer stands: Expanding space stretches light waves longer and redder."}
{"id": "oth_0207", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "Rainfall is 10 mm on 10 m². How many litres fell?", "choices": {"A": "50", "B": "150", "C": "200", "D": "100"}, "answer": "Rain total: 100 litres.", "steps": ["1 mm/m² = 1 L.", "10 × 10 = 100.", "Select option D."], "text": "Answer: 100\nSteps:\n1. 1 mm/m² = 1 L.\n2. 10 × 10 = 100.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0208", "subject": "other", "topic": "technology", "lang": "en", "kind": "concept", "question": "What is GPS?", "choices": null, "answer": "Satellite timing pinpoints receivers worldwide.", "steps": ["Satellite timing pinpoints receivers worldwide.", "So the answer stands: Satellite timing pinpoints receivers worldwide."], "text": "Answer: Satellite timing pinpoints receivers worldwide.\nSteps:\n1. Satellite timing pinpoints receivers worldwide.\n2. So the answer stands: Satellite timing pinpoints receivers worldwide."}
{"id": "oth_0209", "subject": "other", "topic": "arts_basics", "lang": "cs", "kind": "worked_example", "question": "Román má 15 kapitol; týdně se čtou 3. Spočítej týdny.", "choices": null, "answer": "Týdnů: 5.", "steps": ["Kapitol: 15.", "Týdně: 3.", "15 / 3 = 5."], "text": "Answer: Týdnů: 5.\nSteps:\n1. Kapitol: 15.\n2. Týdně: 3.\n3. 15 / 3 = 5."}
{"id": "oth_0210", "subject": "other", "topic": "sports_science", "lang": "cs", "kind": "concept", "question": "Proč hydratace?", "choices": null, "answer": "Voda nahrazuje pot.", "steps": ["Voda nahrazuje pot.", "Odpověď tedy platí: Voda nahrazuje pot."], "text": "Answer: Voda nahrazuje pot.\nSteps:\n1. Voda nahrazuje pot.\n2. Odpověď tedy platí: Voda nahrazuje pot."}
{"id": "oth_0211", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "A country of 9 million people has 3 regions. How many million per region?", "choices": {"A": "2", "B": "4", "C": "5", "D": "3"}, "answer": "Per region: 3 million.", "steps": ["9 / 3.", "= 3.", "Select option D."], "text": "Answer: 3\nSteps:\n1. 9 / 3.\n2. = 3.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0212", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "multiple_choice", "question": "Choose: what binds billions?", "choices": {"A": "Solar panel", "B": "Galaxy", "C": "Wind farm", "D": "Fish school"}, "answer": "The answer is Galaxy.", "steps": ["Gravity holds all.", "So: Galaxy.", "Select option B."], "text": "Answer: Galaxy\nSteps:\n1. Gravity holds all.\n2. So: Galaxy.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0213", "subject": "other", "topic": "everyday_science", "lang": "cs", "kind": "concept", "question": "Proč led plave?", "choices": null, "answer": "Zmrzlá voda se rozpíná a je řidší.", "steps": ["Zmrzlá voda se rozpíná a je řidší.", "Odpověď tedy platí: Zmrzlá voda se rozpíná a je řidší."], "text": "Answer: Zmrzlá voda se rozpíná a je řidší.\nSteps:\n1. Zmrzlá voda se rozpíná a je řidší.\n2. Odpověď tedy platí: Zmrzlá voda se rozpíná a je řidší."}
{"id": "oth_0214", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A backup copies 800 GB at 100 GB/h. Compute the hours.", "choices": null, "answer": "Time: 8 hours.", "steps": ["800 / 100.", "= 8."], "text": "Answer: Time: 8 hours.\nSteps:\n1. 800 / 100.\n2. = 8."}
{"id": "oth_0215", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "Choose: what blends chords?", "choices": {"A": "Harmony", "B": "Noise", "C": "Silence", "D": "Echo"}, "answer": "The answer is Harmony.", "steps": ["Tones layered.", "So: Harmony.", "Select option A."], "text": "Answer: Harmony\nSteps:\n1. Tones layered.\n2. So: Harmony.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0216", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "What is tapering?", "choices": null, "answer": "Eased load before events peaks freshness.", "steps": ["Eased load before events peaks freshness.", "So the answer stands: Eased load before events peaks freshness."], "text": "Answer: Eased load before events peaks freshness.\nSteps:\n1. Eased load before events peaks freshness.\n2. So the answer stands: Eased load before events peaks freshness."}
{"id": "oth_0217", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "What is climate?", "choices": null, "answer": "Long-term weather averages define deserts, tropics, and tundra zones.", "steps": ["Long-term weather averages define deserts, tropics, and tundra zones.", "So the answer stands: Long-term weather averages define deserts, tropics, and tundra zones."], "text": "Answer: Long-term weather averages define deserts, tropics, and tundra zones.\nSteps:\n1. Long-term weather averages define deserts, tropics, and tundra zones.\n2. So the answer stands: Long-term weather averages define deserts, tropics, and tundra zones."}
{"id": "oth_0218", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "A telescope magnifies 40×; the Moon spans 0.5°. Compute apparent width.", "choices": null, "answer": "Apparent width: 20°.", "steps": ["0.5 × 40.", "= 20°."], "text": "Answer: Apparent width: 20°.\nSteps:\n1. 0.5 × 40.\n2. = 20°."}
{"id": "oth_0219", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "Pasta needs 4 litre per 100 g. Compute litres for 300 g.", "choices": null, "answer": "Water needed: 12 litres.", "steps": ["300/100 = 3.", "3 × 4.", "= 12."], "text": "Answer: Water needed: 12 litres.\nSteps:\n1. 300/100 = 3.\n2. 3 × 4.\n3. = 12."}
{"id": "oth_0220", "subject": "other", "topic": "technology", "lang": "en", "kind": "worked_example", "question": "A 400 MB file downloads at 50 MB/s. Compute the seconds.", "choices": null, "answer": "Time: 8 seconds.", "steps": ["400 / 50.", "= 8."], "text": "Answer: Time: 8 seconds.\nSteps:\n1. 400 / 50.\n2. = 8."}
{"id": "oth_0221", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "multiple_choice", "question": "Choose: what groups stories?", "choices": {"A": "Gender", "B": "Genre", "C": "General", "D": "Genius"}, "answer": "The answer is Genre.", "steps": ["Conventions shared.", "So: Genre.", "Select option B."], "text": "Answer: Genre\nSteps:\n1. Conventions shared.\n2. So: Genre.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0222", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "Why heart-rate zones?", "choices": null, "answer": "Intensity bands target fat, tempo, and peak systems.", "steps": ["Intensity bands target fat, tempo, and peak systems.", "So the answer stands: Intensity bands target fat, tempo, and peak systems."], "text": "Answer: Intensity bands target fat, tempo, and peak systems.\nSteps:\n1. Intensity bands target fat, tempo, and peak systems.\n2. So the answer stands: Intensity bands target fat, tempo, and peak systems."}
{"id": "oth_0223", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "Prague shows 9:00; a city is +6 h ahead. Find the local time.", "choices": null, "answer": "Local time: 15:00.", "steps": ["Base 9.", "Add 6.", "= 15:00."], "text": "Answer: Local time: 15:00.\nSteps:\n1. Base 9.\n2. Add 6.\n3. = 15:00."}
{"id": "oth_0224", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "Sunlight takes 8 min per AU. Compute light time to 6 AU.", "choices": null, "answer": "Light time: 48 min.", "steps": ["Per AU: 8.", "Distance: 6.", "8 × 6 = 48."], "text": "Answer: Light time: 48 min.\nSteps:\n1. Per AU: 8.\n2. Distance: 6.\n3. 8 × 6 = 48."}
{"id": "oth_0225", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "worked_example", "question": "A 6000 mAh battery feeds a 500 mA device. Compute runtime hours.", "choices": null, "answer": "Runtime: 12 hours.", "steps": ["6000 / 500.", "= 12."], "text": "Answer: Runtime: 12 hours.\nSteps:\n1. 6000 / 500.\n2. = 12."}
{"id": "oth_0226", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "A screen shows 90 fps for 2 s. How many frames?", "choices": {"A": "150", "B": "210", "C": "240", "D": "180"}, "answer": "Frame count: 180.", "steps": ["90 × 2.", "= 180.", "Select option D."], "text": "Answer: 180\nSteps:\n1. 90 × 2.\n2. = 180.\n3. Select option D.\nAnswer: (D)"}
{"id": "oth_0227", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "Why critiques?", "choices": null, "answer": "Reviews guide audiences and sharpen artists.", "steps": ["Reviews guide audiences and sharpen artists.", "So the answer stands: Reviews guide audiences and sharpen artists."], "text": "Answer: Reviews guide audiences and sharpen artists.\nSteps:\n1. Reviews guide audiences and sharpen artists.\n2. So the answer stands: Reviews guide audiences and sharpen artists."}
{"id": "oth_0228", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "concept", "question": "Why cool down?", "choices": null, "answer": "Easy movement after sport clears waste and calms pulse gently.", "steps": ["Easy movement after sport clears waste and calms pulse gently.", "So the answer stands: Easy movement after sport clears waste and calms pulse gently."], "text": "Answer: Easy movement after sport clears waste and calms pulse gently.\nSteps:\n1. Easy movement after sport clears waste and calms pulse gently.\n2. So the answer stands: Easy movement after sport clears waste and calms pulse gently."}
{"id": "oth_0229", "subject": "other", "topic": "geography", "lang": "en", "kind": "concept", "question": "Why monsoons?", "choices": null, "answer": "Seasonal wind flips drench Asia in summer and dry it in winter.", "steps": ["Seasonal wind flips drench Asia in summer and dry it in winter.", "So the answer stands: Seasonal wind flips drench Asia in summer and dry it in winter."], "text": "Answer: Seasonal wind flips drench Asia in summer and dry it in winter.\nSteps:\n1. Seasonal wind flips drench Asia in summer and dry it in winter.\n2. So the answer stands: Seasonal wind flips drench Asia in summer and dry it in winter."}
{"id": "oth_0230", "subject": "other", "topic": "astronomy", "lang": "cs", "kind": "concept", "question": "Co je zatmění Slunce?", "choices": null, "answer": "Měsíc krátce zakryje Slunce.", "steps": ["Měsíc krátce zakryje Slunce.", "Odpověď tedy platí: Měsíc krátce zakryje Slunce."], "text": "Answer: Měsíc krátce zakryje Slunce.\nSteps:\n1. Měsíc krátce zakryje Slunce.\n2. Odpověď tedy platí: Měsíc krátce zakryje Slunce."}
{"id": "oth_0231", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "Choose: what beads on glass?", "choices": {"A": "Condensation", "B": "Sublimation", "C": "Filtration", "D": "Irrigation"}, "answer": "The answer is Condensation.", "steps": ["Vapour cooled down.", "So: Condensation.", "Select option A."], "text": "Answer: Condensation\nSteps:\n1. Vapour cooled down.\n2. So: Condensation.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0232", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "Choose: what shrinks storage?", "choices": {"A": "Compression", "B": "Inflation", "C": "Erosion", "D": "Corrosion"}, "answer": "The answer is Compression.", "steps": ["Redundancy removed.", "So: Compression.", "Select option A."], "text": "Answer: Compression\nSteps:\n1. Redundancy removed.\n2. So: Compression.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0233", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "worked_example", "question": "A novel has 24 chapters; 3 are read per week. Count the weeks.", "choices": null, "answer": "Weeks: 8.", "steps": ["Chapters: 24.", "Per week: 3.", "24 / 3 = 8."], "text": "Answer: Weeks: 8.\nSteps:\n1. Chapters: 24.\n2. Per week: 3.\n3. 24 / 3 = 8."}
{"id": "oth_0234", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "Training burns 450 kcal per session over 3 sessions. Compute total kcal.", "choices": null, "answer": "Total: 1350 kcal.", "steps": ["450 × 3.", "= 1350."], "text": "Answer: Total: 1350 kcal.\nSteps:\n1. 450 × 3.\n2. = 1350."}
{"id": "oth_0235", "subject": "other", "topic": "geography", "lang": "en", "kind": "worked_example", "question": "A 1:100000 map shows 6 cm. Convert to real km.", "choices": null, "answer": "Real distance: 6 km.", "steps": ["1 cm = 1 km.", "6 cm.", "= 6 km."], "text": "Answer: Real distance: 6 km.\nSteps:\n1. 1 cm = 1 km.\n2. 6 cm.\n3. = 6 km."}
{"id": "oth_0236", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "worked_example", "question": "A mission lasts 500 days with 4 checkups. Find days per checkup.", "choices": null, "answer": "Days per checkup: 125.", "steps": ["Total 500.", "Checkups 4.", "500 / 4 = 125."], "text": "Answer: Days per checkup: 125.\nSteps:\n1. Total 500.\n2. Checkups 4.\n3. 500 / 4 = 125."}
{"id": "oth_0237", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "multiple_choice", "question": "Choose: what kills germs briefly?", "choices": {"A": "Freezing", "B": "Pasteurization", "C": "Salting", "D": "Smoking"}, "answer": "The answer is Pasteurization.", "steps": ["Flavour mostly kept.", "So: Pasteurization.", "Select option B."], "text": "Answer: Pasteurization\nSteps:\n1. Flavour mostly kept.\n2. So: Pasteurization.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0238", "subject": "other", "topic": "technology", "lang": "en", "kind": "multiple_choice", "question": "Choose: what pinpoints globally?", "choices": {"A": "FM", "B": "GPS", "C": "AM", "D": "SMS"}, "answer": "The answer is GPS.", "steps": ["Satellites timed.", "So: GPS.", "Select option B."], "text": "Answer: GPS\nSteps:\n1. Satellites timed.\n2. So: GPS.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0239", "subject": "other", "topic": "arts_basics", "lang": "en", "kind": "concept", "question": "What is chiaroscuro?", "choices": null, "answer": "Light-dark contrast sculpts painted forms.", "steps": ["Light-dark contrast sculpts painted forms.", "So the answer stands: Light-dark contrast sculpts painted forms."], "text": "Answer: Light-dark contrast sculpts painted forms.\nSteps:\n1. Light-dark contrast sculpts painted forms.\n2. So the answer stands: Light-dark contrast sculpts painted forms."}
{"id": "oth_0240", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "multiple_choice", "question": "Choose: what wins endurance?", "choices": {"A": "Sprinting", "B": "Pacing", "C": "Stopping", "D": "Stumbling"}, "answer": "The answer is Pacing.", "steps": ["Effort spread even.", "So: Pacing.", "Select option B."], "text": "Answer: Pacing\nSteps:\n1. Effort spread even.\n2. So: Pacing.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0241", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "Choose: what measures north-south?", "choices": {"A": "Latitude", "B": "Altitude", "C": "Magnitude", "D": "Period"}, "answer": "The answer is Latitude.", "steps": ["Equator is zero.", "So: Latitude.", "Select option A."], "text": "Answer: Latitude\nSteps:\n1. Equator is zero.\n2. So: Latitude.\n3. Select option A.\nAnswer: (A)"}
{"id": "oth_0242", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "What is the ISS?", "choices": null, "answer": "A crewed lab orbiting Earth every 90 minutes.", "steps": ["A crewed lab orbiting Earth every 90 minutes.", "So the answer stands: A crewed lab orbiting Earth every 90 minutes."], "text": "Answer: A crewed lab orbiting Earth every 90 minutes.\nSteps:\n1. A crewed lab orbiting Earth every 90 minutes.\n2. So the answer stands: A crewed lab orbiting Earth every 90 minutes."}
{"id": "oth_0243", "subject": "other", "topic": "everyday_science", "lang": "en", "kind": "concept", "question": "What is a battery?", "choices": null, "answer": "Chemical reactions push electrons through circuits as current.", "steps": ["Chemical reactions push electrons through circuits as current.", "So the answer stands: Chemical reactions push electrons through circuits as current."], "text": "Answer: Chemical reactions push electrons through circuits as current.\nSteps:\n1. Chemical reactions push electrons through circuits as current.\n2. So the answer stands: Chemical reactions push electrons through circuits as current."}
{"id": "oth_0244", "subject": "other", "topic": "technology", "lang": "cs", "kind": "concept", "question": "Co je pixel?", "choices": null, "answer": "Jeden barevný bod obrazu.", "steps": ["Jeden barevný bod obrazu.", "Odpověď tedy platí: Jeden barevný bod obrazu."], "text": "Answer: Jeden barevný bod obrazu.\nSteps:\n1. Jeden barevný bod obrazu.\n2. Odpověď tedy platí: Jeden barevný bod obrazu."}
{"id": "oth_0245", "subject": "other", "topic": "arts_basics", "lang": "cs", "kind": "concept", "question": "Co je perspektiva?", "choices": null, "answer": "Techniky falešné hloubky na plátně.", "steps": ["Techniky falešné hloubky na plátně.", "Odpověď tedy platí: Techniky falešné hloubky na plátně."], "text": "Answer: Techniky falešné hloubky na plátně.\nSteps:\n1. Techniky falešné hloubky na plátně.\n2. Odpověď tedy platí: Techniky falešné hloubky na plátně."}
{"id": "oth_0246", "subject": "other", "topic": "sports_science", "lang": "en", "kind": "worked_example", "question": "Max heart rate is 220 − age. Compute it for age 40.", "choices": null, "answer": "Max rate: 180 bpm.", "steps": ["220 − 40.", "= 180."], "text": "Answer: Max rate: 180 bpm.\nSteps:\n1. 220 − 40.\n2. = 180."}
{"id": "oth_0247", "subject": "other", "topic": "geography", "lang": "en", "kind": "multiple_choice", "question": "Choose: what carves U-valleys?", "choices": {"A": "Rivers", "B": "Glaciers", "C": "Roads", "D": "Trails"}, "answer": "The answer is Glaciers.", "steps": ["Ice creeps down.", "So: Glaciers.", "Select option B."], "text": "Answer: Glaciers\nSteps:\n1. Ice creeps down.\n2. So: Glaciers.\n3. Select option B.\nAnswer: (B)"}
{"id": "oth_0248", "subject": "other", "topic": "astronomy", "lang": "en", "kind": "concept", "question": "Why leap years?", "choices": null, "answer": "Extra days sync calendars with Earth's 365.25-day orbit.", "steps": ["Extra days sync calendars with Earth's 365.25-day orbit.", "So the answer stands: Extra days sync calendars with Earth's 365.25-day orbit."], "text": "Answer: Extra days sync calendars with Earth's 365.25-day orbit.\nSteps:\n1. Extra days sync calendars with Earth's 365.25-day orbit.\n2. So the answer stands: Extra days sync calendars with Earth's 365.25-day orbit."}
{"id": "oth_0249", "subject": "other", "topic": "everyday_science", "lang": "cs", "kind": "multiple_choice", "question": "Srážky jsou 5 mm na 10 m². Kolik litrů spadlo?", "choices": {"A": "0", "B": "100", "C": "50", "D": "150"}, "answer": "Celkem: 50 litrů.", "steps": ["1 mm/m² = 1 l.", "5 × 10 = 50.", "Vyber možnost C."], "text": "Answer: 50\nSteps:\n1. 1 mm/m² = 1 l.\n2. 5 × 10 = 50.\n3. Vyber možnost C.\nAnswer: (C)"}
{"id": "oth_0250", "subject": "other", "topic": "technology", "lang": "cs", "kind": "worked_example", "question": "Záloha kopíruje 500 GB rychlostí 100 GB/h. Spočítej hodiny.", "choices": null, "answer": "Čas: 5 hodin.", "steps": ["500 / 100.", "= 5."], "text": "Answer: Čas: 5 hodin.\nSteps:\n1. 500 / 100.\n2. = 5."}