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Doctors say the average adult needs seven to <mask> hours of sleep a night. | 3nine |
Watermelons produce <mask> types of flowers. | 10two |
Youngsters stay with their parents up to <mask> years. | 2four |
Water is the only substance that naturally occurs in all <mask> states on earth. | 9three |
Women have <mask> ovaries. | 10two |
Milk is a good source of all <mask> nutrients. | 9three |
Showers have a lip of <mask> inches or less. | 10two |
Fusion is similar to that described in Chlamydomonas, forming a zygote with <mask> flagella. | 2four |
Cows give birth every <mask> to five years. | 9three |
Cows give birth every three to <mask> years. | 1five |
Men are <mask> times more likely to die from drowning. | 1five |
Lifespans range from <mask> to over thirty years. | 9three |
Fingerlings are about three inches <mask> months after hatching. | 7six |
Benedictine monks make <mask> vows as a sign of their commitment to the monastic way of life. | 9three |
Every insect has <mask> legs, that's an insect. | 7six |
Snapdragons are annual flowering plants that grow one to <mask> feet and thrive on sunshine. | 2four |
Some people like to feed their pets once a day and some up to <mask> times a day. | 9three |
Tumors usually shrink within <mask> to two days of therapy. | 5one |
Tumors usually shrink within one to <mask> days of therapy. | 10two |
Spiders have one, two, or <mask> pairs of spinnerets. | 9three |
Latin nouns come in <mask> classes, or spelling groups, also called 'declensions'. | 1five |
Bluegills average <mask> to ten inches in length. | 2four |
Bluegills average four to <mask> inches in length. | 8ten |
Abdominal scars consist of <mask> to four half-inch incisions. | 10two |
Abdominal scars consist of two to <mask> half-inch incisions. | 2four |
Crystal growth is affected by <mask> naturally occurring factors. | 2four |
Bloody diarrhea lasts for <mask> to five days. | 10two |
Bloody diarrhea lasts for two to <mask> days. | 1five |
Sexual maturity is reached at about <mask> years of age. | 6seven |
Adult roundworms have a funny face, with <mask> big lips surrounding their mouth. | 9three |
Sexual reproduction combines the genetic materials of <mask> plants. | 10two |
Skunks see well up to only about <mask> feet. | 9three |
Disaccharides are <mask> joined monosaccharides. | 10two |
Waves have <mask> mass and yet they carry energy as they travel through space. | 4no |
Huntsman spiders have large, hairy bodies with <mask> long legs. | 0eight |
Infertility affects about <mask> in six couples of child-bearing age. | 5one |
Infertility affects about one in <mask> couples of child-bearing age. | 7six |
Most commercial fertilizers contain all <mask> main nutrients plus some trace elements. | 9three |
Females reach sexual maturity around four to <mask> year-olds. | 1five |
Green iguanas are handsome creatures, but they can grow up to <mask> feet long, and be aggressive. | 7six |
Women are <mask> times more likely to be affected than men are. | 9three |
Dietary fiber acts as if it had <mask> calories and is found only in plant sources. | 11zero |
Tellurium trioxide can come in <mask> forms. | 10two |
Natural resources can be of <mask> types. | 9three |
Color codes are a <mask> digit number for either background or text. | 7six |
Organizations There are <mask> organizations in the United States that govern dog agility. | 2four |
Cabbageworms come in <mask> varieties. | 10two |
Autism is <mask> times more likely to be found in boys than girls. | 2four |
Perception has <mask> levels of complexity. | 9three |
Ice covers about <mask> percent of the world's water surface. | 9three |
Insects have <mask> pairs and arachnids have four pairs of limbs. | 9three |
Insects have three pairs and arachnids have <mask> pairs of limbs. | 2four |
Glycolysis has <mask> steps. | 10two |
Mothers typically have from <mask> to six cubs, which are born blind and toothless. | 5one |
Magnesium exists as <mask> isotopes in nature. | 9three |
Figs are dry when they feel leathery and show <mask> pockets of moisture. | 4no |
Phylogenetic analyses confirm <mask> mitochondrial mallard clades. | 10two |
Martian meteorite shows <mask> signs of life on the red planet. | 4no |
Collision detection determines if <mask> objects collide with each other. | 10two |
Beer is a word with <mask> meanings. | 10two |
Salt can come from <mask> sources. | 10two |
Fringed campion occurs in <mask> distinct geographic areas. | 10two |
Acoustic guitars come in <mask> types. | 10two |
Life flows past the <mask> dimensions of the body like radio waves escaping from an electrical wire. | 9three |
Most children recover from croup in <mask> to five days. | 9three |
Most children recover from croup in three to <mask> days. | 1five |
Hyperactive children become magnesium deficient for <mask> reasons. | 10two |
Sexual maturity is reached at about <mask> years. | 9three |
Bovine insulin differs from human in only <mask> amino acid residues, and porcine insulin in one. | 9three |
Mangroves have <mask> basic organs lika any other ordinary plant, the stem, the leaf and the root. | 9three |
Mumps is contagious <mask> days prior to and nine days after the onset of symptoms. | 6seven |
Mumps is contagious seven days prior to and <mask> days after the onset of symptoms. | 3nine |
Citrus is picked from trees at least <mask> years old. | 9three |
Ornithologists estimate their precolonial population at <mask> to three billion. | 10two |
Ornithologists estimate their precolonial population at two to <mask> billion. | 9three |
Chimpanzees reach puberty between the age of <mask> and ten years. | 0eight |
Chimpanzees reach puberty between the age of eight and <mask> years. | 8ten |
Overprints are new colors formed when <mask> colors are combined. | 10two |
Loons typically produce <mask> eggs each year. | 10two |
All ants have <mask> body parts, a pair of , elbowed antennae, six legs and a pinched waist. | 9three |
Women have a longer life expectancy, outliving men by an average of seven to <mask> years. | 0eight |
Larger sodas can have <mask> times more calories. | 9three |
Braids range from three to <mask> or more strands. | 6seven |
Communities have few or <mask> dogs and cats because they've been eaten. | 4no |
Silkies have <mask> seasonal moults but little hair is dropped. | 10two |
Aphids are and carry at least <mask> diseases. | 10two |
Scientists spend <mask> to nine hours a day in the water and often venture out at night as well. | 7six |
Beer consists of <mask> essential ingredients which categorizing a beverage as beer. | 2four |
Phosphates are made of <mask> phosphorus atom surrounded by four oxygen atoms. | 5one |
Phosphates are made of one phosphorus atom surrounded by <mask> oxygen atoms. | 2four |
Ultraviolet radiation falls under <mask> categories separated by wavelength. | 9three |
Seasons occur because of <mask> factors working together. | 10two |
Humans exhibit <mask> characteristic types of eye motion. | 2four |
Triclinic system has <mask> axes all of different lengths and all inclined to each other. | 9three |
Dragonflies have <mask> pairs of wings. | 10two |
Speciation can occur when <mask> populations occupy different habitats. | 10two |
Women are almost <mask> times as likely to be in nursing homes as men. | 9three |
Insects develop from an egg into an adult in <mask> ways. | 9three |
Abalone are marine mollusks, with <mask> species inhabiting the west coast of North America. | 0eight |
Nodes are points in space that have <mask> probability for locating an electron there. | 11zero |
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