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null
null
q_0015e31978620fd6
ambiguity
In the land of Puzzlia, the wise mathematician, Professor Numble, has devised a game to challenge the young minds of the kingdom. The game board is an infinite grid of squares, with each square numbered according to its row and column, starting from (1,1). The game begins with a piece placed at the origin (1,1). In eac...
v1
train
C
INVALID
INVALID
null
true
673
q_00fd275e36483334
null
What is the smallest positive integer n such that \(n! \equiv 0 \pmod{2019}\)? (Hint: Consider the prime factorization of 2019 and the nature of factorials.)
v1
train
A
VALID
673
1
true
By the Cauchy–Schwarz inequality, \[ \frac{a^2}{b}+\frac{b^2}{c}+\frac{c^2}{a} \ge \frac{(a+b+c)^2}{a+b+c}=\frac{9}{3}=3. \] Equality holds when \(a/b=b/c=c/a\), which for positive \(a,b,c\) gives \(a=b=c=1\).
q_011e41cb067fbbe3
null
Given positive real numbers \( a, b, c \) such that \( a + b + c = 3 \), prove that: \[ \frac{a^2}{b} + \frac{b^2}{c} + \frac{c^2}{a} \geq 3. \]
v1
train
A
VALID
By the Cauchy–Schwarz inequality, \[ \frac{a^2}{b}+\frac{b^2}{c}+\frac{c^2}{a} \ge \frac{(a+b+c)^2}{a+b+c}=\frac{9}{3}=3. \] Equality holds when \(a/b=b/c=c/a\), which for positive \(a,b,c\) gives \(a=b=c=1\).
1
null
null
q_012eadad9fc30481
ambiguity
In a futuristic city, every resident is either a truth-teller (who always tells the truth) or a liar (who always lies). One day, a curious young mathematician decides to investigate the city's population by asking a series of questions to various residents. He picks a random resident and asks, "Is your friend a truth-t...
v5
train
C
INVALID
INVALID
null
null
null
q_01679b5f9f55c7b3
no_solution
{Let \(P(x)\) be a polynomial with integer coefficients such that \(P(1) = 10\) and \(P(2) = 20\). Prove that there is no integer \(k\) for which \(P(k) = 30\), given that \(P(x)\) has degree at least 3.}
v4
train
D
INVALID
INVALID
null
true
260 square feet
q_0184b2f2c390fddb
null
A rectangular garden is divided into four smaller rectangles by two straight paths, one horizontal and one vertical. The paths are 2 feet wide and run the entire length of the garden. If the total area of the garden (including the paths) is 320 square feet, and the total area of the paths alone is 60 square feet, what ...
v1
train
A
VALID
260 square feet
1
true
0
q_0196ca4d4887c047
null
In the complex plane, let $P(z) = z^8 + \left(4\sqrt{3} + 6\right)z^4 - \left(4\sqrt{3} + 7\right)$. For how many complex numbers $z$ is the product of the real part of $z$ and the imaginary part of $z$ a positive integer and $P(z) = 0$?
v4
train
A
VALID
0
1
null
null
q_01a6ea1848beba46
contradiction
A circle is inscribed in an isosceles triangle with sides of lengths 13, 14, and 15 units. A smaller circle is then inscribed in the same triangle, tangent to the two equal sides and to the inscribed circle. Find the radius of the smaller circle.
v3
train
D
INVALID
INVALID
null
null
null
q_01b0265bfc050b97
malformed
A convex polygon \( P \) in the plane has vertices \( V_1, V_2, \ldots, V_n \) and an area \( A(P) \). Let \( C \) be the circumcircle of \( P \) and \( r \) be its radius. Consider the function \( f(x) = \frac{A(P + xC)}{A(P)} \), where \( P + xC \) denotes the polygon obtained by scaling \( C \) by a factor of \( x \...
v4
train
E
INVALID
INVALID
null
null
null
q_01c3d3fa860fbf9f
no_solution
A magical garden is arranged in a perfect circle and contains a variety of flowers. Each flower blooms only on the days when the total number of blooms is a perfect square. Given that on day 1, there is exactly 1 blooming flower, and the number of blooming flowers doubles every 2 days, find the smallest day number wher...
v5
train
D
INVALID
INVALID
null
null
null
q_01d178a6b13fc041
ambiguity
Given a regular 2021-gon \(P\) inscribed in a circle with radius \(r\), let \(A\), \(B\), and \(C\) be three vertices of \(P\) such that the arc length between \(A\) and \(B\), \(B\) and \(C\), and \(C\) and \(A\) are in arithmetic progression. Determine the area of the triangle formed by \(A\), \(B\), and \(C\) in ter...
v3
train
C
INVALID
INVALID
null
true
4950
q_01de192facf3c9be
null
In a country with 100 cities, every city is connected to every other city by a road. Each road is uniquely colored and no two roads of the same color share an endpoint. What is the maximum number of colors that can be used for the roads under these conditions?
v1
train
A
VALID
4950
0.99
true
3
q_01e6b354801d98da
null
What is the smallest positive integer \( n \) such that the expression \( \frac{n^2 + 2n + 1}{n^2 - 3n + 2} \) is an integer?
v1
train
A
VALID
3
1
null
null
q_01f12032618e2caf
malformed
In a sequence of positive integers, each term after the first is obtained by adding the previous two terms. The first term is 1, and the second term is a positive integer less than 10. If the 10th term in this sequence is a multiple of 12, find the number of possible values for the second term.
v3
train
E
INVALID
INVALID
null
true
24
q_01fb654a0317452b
null
In the kingdom of Numeralia, there is a unique type of gemstone known as the "Prime Orb." Each Orb contains a prime number, \( p \), and the King has decided to distribute these Orbs among his 12 most distinguished scholars. Each scholar can only receive one Orb, and each Orb's prime number must be a divisor of the sum...
v4
train
A
VALID
24
0.99
null
null
q_0207e2abeb032c4f
contradiction
Let \( P \) be a convex polygon with \( n \) sides. A *beautiful coloring* of \( P \) is a coloring of the vertices and edges of \( P \) using exactly three colors such that: 1. Any two adjacent vertices (connected by an edge) have different colors. 2. Any two vertices on the same side (not necessarily adjacent) have ...
v5
train
D
INVALID
INVALID
null
true
1
q_0234f84ac6a82a9e
null
Find the smallest positive integer n such that the sum of the cubes of the first n positive integers is divisible by the product of the first n positive integers.
v2
train
A
VALID
1
1
true
\(\frac{51017}{81642}\)
q_0235235c1cfb4de0
null
在平面直角坐标系中,有一系列由正整数组成的点集合 \( S = \{ (x, y) | x, y \in \mathbb{Z}^+, x + y \leq 100 \} \),其中 \( \mathbb{Z}^+ \) 表示所有正整数的集合。现在从集合 \( S \) 中随机选择三个不同的点 \( A(x_1, y_1) \), \( B(x_2, y_2) \) 和 \( C(x_3, y_3) \)。设这三个点组成的三角形面积为 \( T \)。求 \( T \) 为整数的概率。
v2
train
A
VALID
\(\frac{51017}{81642}\)
0.99
true
101
q_026d6575590f2df3
null
In the Cartesian coordinate system, let $P$ be a point with integer coordinates such that $1 \leq P_x, P_y \leq 100$. A *path* from $P$ to another point $Q$ is defined as a sequence of steps, each moving either one unit to the right or one unit up, without revisiting any previously visited point. A *special path* is a ...
v5
train
A
VALID
101
0.99
true
8
q_0271acef0bec7b0b
null
How many positive integers less than 500 are divisible by 4, 5, and 6?
v1
train
A
VALID
8
1
null
null
q_02ab066130fe57ed
no_solution
在三维空间中,有三个正交坐标轴 \(x, y, z\),轴上分别标记了点 \(A_1, A_2\) 和 \(B_1, B_2\)。\(A_1\) 的坐标为 \((a_1, 0, 0)\),\(A_2\) 的坐标为 \((0, a_2, 0)\),而 \(B_1\) 和 \(B_2\) 的坐标分别为 \((b_1, 0, 0)\) 和 \((0, b_2, 0)\),其中 \(a_1, a_2, b_1,\) 和 \(b_2\) 是互不相同的正整数。如果从原点 \(O\) 出发,沿着正交路径到达 \(A_1\),然后到达 \(B_1\),接着返回原点,再沿另一条不同的路径到达 \(A_2\),最后到达 \(B_2\),已知整个行程中经...
v4
train
D
INVALID
INVALID
null
null
null
q_02bee8e9f6f7bba0
contradiction
Let \( P(x) \) be a polynomial with integer coefficients such that \( P(1) = 2023 \) and \( P(2) = 4046 \). Suppose that there exists an integer \( n \) for which \( P(n) = 2023 \) and \( P(n+1) = 2024 \). Find the smallest possible value of \( n \). For example, if \( P(x) = x^2 + 1903 \), then \( P(1) = 2023 \) and ...
v3
train
D
INVALID
INVALID
null
null
null
q_02ca020b49db8f21
ambiguity
In a magical forest, there are trees that grow in a unique pattern. Each tree has a certain number of branches, and each branch can grow in one of four directions: north, south, east, or west. However, no two branches on the same tree can grow in the same direction. Trees are magically programmed to grow their branches...
v5
train
C
INVALID
INVALID
null
null
null
q_02e72163e0a02fca
contradiction
Find all positive integers \( n \) such that the equation \( x^2 + y^2 + z^2 + 3(x + y + z) = nxyz \) has a solution in positive integers, and additionally, satisfy the constraints: 1. \( x, y, z \leq 10 \) 2. \( n < 100 \) 3. \( x, y, z \) are pairwise coprime. Which of the following is a possible value of \( n \) if...
v3
train
D
INVALID
INVALID
null
null
null
q_0304b0789e3452cf
no_solution
Let $f(n)$ be the number of ways to express $n$ as the sum of positive integers, where the order of the summands matters. For example, $f(3) = 4$ because $3$ can be expressed as $3, 2+1, 1+2,$ and $1+1+1$. Find the smallest positive integer $n$ such that $f(n) = 120$.
v1
train
D
INVALID
INVALID
null
null
null
q_032dc211ecbc1d01
malformed
在平面直角坐标系中,给定两个点 \(A(1, 2)\) 和 \(B(4, 7)\),以及一条圆周 \(C: (x-3)^2 + (y-3)^2 = 4\)。设 \(P\) 是圆周 \(C\) 上任意一点,直线 \(AP\) 和直线 \(BP\) 分别与圆周 \(C\) 在不同于 \(P\) 的点处相交,记为 \(Q_A\) 和 \(Q_B\) 分别对应。令 \(L\) 为直线 \(PQ_A\) 和直线 \(PQ_B\) 之比的最小值。试求圆周 \(C\) 对直线 \(AB\) 沿着 \(P\) 的\(L\)的最大可能值。
v4
train
E
INVALID
INVALID
null
null
null
q_0375dd1d98024ab8
malformed
In the mystical land of Numerica, there exists an ancient city called Algoradda. The city is organized into $n$ concentric rings, with the innermost ring being Ring 1, and the outermost ring being Ring $n$. Each ring is inhabited by a different species of creatures, and the number of creatures in each ring forms a uniq...
v5
train
E
INVALID
INVALID
null
true
\(\frac{\pi}{3\sqrt{3}}\)
q_03872f070570d349
null
A circle is inscribed in an equilateral triangle with side length \( s \). If a point is randomly selected from inside the triangle, what is the probability that it lies within the circle?
v1
train
A
VALID
\(\frac{\pi}{3\sqrt{3}}\)
1
null
null
q_038c52710b7fd627
no_solution
In a mysterious ancient city, there are $N$ magical stones, each one endowed with a unique power level that is a positive integer. Legend has it that when a person seeks power, they must traverse a mystical path consisting of $N$ points connected by exactly $N-1$ unidirectional roads, forming a tree structure. The powe...
v3
train
D
INVALID
INVALID
null
null
null
q_039cc2d7e2b2ab97
no_solution
Consider a sequence of integers \((a_n)\) defined by \(a_1 = 1\), \(a_2 = 2\), and for \(n \geq 3\), \(a_n\) is the smallest integer greater than \(a_{n-1}\) such that the polynomial \(P(x) = x^3 + a_n x^2 + a_{n-1} x + a_{n-2}\) has three distinct real roots. Find the value of \(a_{10}\).
v2
train
D
INVALID
INVALID
null
null
null
q_03a0e8911f0f5f56
contradiction
Let \( p(x) \) be a monic polynomial of degree \( n \) with real coefficients such that \( p(0) = 1 \) and for all real numbers \( x \), the equation \[ p(x) + p(1 - x) = 2x^2 + 1 \] holds. Determine the sum of all roots of the equation \( p(x) = x \).
v4
train
D
INVALID
INVALID
null
null
null
q_03ccc7eb0825916b
ambiguity
Find all integers \( n \) such that the equation \[ \sum_{k=1}^{n} \frac{1}{k^2} = \frac{a}{b} \] has integer solutions for \( a \) and \( b \) with \( \gcd(a, b) = 1 \), where \( b \neq 1 \). How many such \( n \) exist, and what are the corresponding fractions \( \frac{a}{b} \)?
v3
train
C
INVALID
INVALID
null
null
null
q_03e72870211638a7
no_solution
In the complex plane, consider the function \( f(z) = z^3 - 3z^2 + 2z \). Let \( \gamma \) be the circle \( |z| = 2 \) traversed counterclockwise. Using the argument principle, determine the number of zeros of \( f(z) \) inside \( \gamma \), counting multiplicities.
v2
train
D
INVALID
INVALID
null
null
null
q_03f41e2385ffefe8
contradiction
In the mystical land of Mathoria, there exists a magical sequence of numbers, the *Mathorian Harmonies*. The sequence is defined by the recurrence relation: \(a_{n+2} = a_{n+1} + a_n + a_{n-1}\) for all \(n \geq 2\), with initial conditions \(a_1 = 1\), \(a_2 = 1\), and \(a_3 = 2\). Each term of the sequence is also as...
v5
train
D
INVALID
INVALID
null
true
448
q_04397cd08208d5fd
null
Let $S$ be the set of all positive integers $n$ such that $n^2 + 12n - 2007$ is a perfect square. Find the sum of all elements in $S$ that are less than 1000.
v2
train
A
VALID
448
1
true
128 square units
q_043d80987e42e7dc
null
Three distinct points \( A \), \( B \), and \( C \) lie on a circle of radius \( 10 \) units. If the distance from the center of the circle to the midpoint of segment \( AC \) is \( 6 \) units, what is the maximum possible area of triangle \( ABC \)?
v1
train
A
VALID
128 square units
1
true
1
q_0440e3c6e82c8727
null
Find the smallest positive integer \( n \) such that the number of integers \( k \) satisfying \( 1 \leq k \leq n \) and \( k^3 \equiv 1 \pmod{n} \) is equal to the number of integers \( m \) satisfying \( 1 \leq m \leq n \) and \( m^2 \equiv 1 \pmod{n} \).
v2
train
A
VALID
1
0.99
null
null
q_044361e979849562
contradiction
A convex polyhedron has 18 vertices and 32 faces. Determine the number of edges of the polyhedron, knowing that each vertex is connected to 5 other vertices, and every face is a triangle or a quadrilateral. Additionally, if one edge is removed, how many triangles remain?
v3
train
D
INVALID
INVALID
null
true
24
q_04447f9941be7e23
null
What is the remainder when the product of the first 100 positive integers that are not divisible by 5 is divided by 100?
v1
train
A
VALID
24
0.99
null
null
q_045396c257c17aa6
contradiction
In the coordinate plane, a square $ABCD$ has vertices $A(0,0)$, $B(0,6)$, $C(6,6)$, and $D(6,0)$. A point $P$ is chosen inside the square such that the distances from $P$ to the sides of the square are $p$, $q$, $r$, and $s$ where $p + q = r + s = 3$. Find the area of quadrilateral $APCB$.
v1
train
D
INVALID
INVALID
null
null
null
q_0463804b11e40d77
no_solution
There exists a sequence of real numbers \(a_1, a_2, \ldots, a_n\) where \(n \geq 2\). The sequence has the property that for each \(k\) (with \(1 \leq k < n\)), \(a_{k+1}\) is the average of the previous \(k\) terms. Given that \(a_1 = 1\) and the sum of all terms in the sequence is equal to \(n + \frac{1}{2}\), find t...
v2
train
D
INVALID
INVALID
null
null
null
q_04682d95fad0f1ff
contradiction
Let \( f(x) \) be a polynomial of degree 5 with integer coefficients such that \( f(1) = 0 \) and \( f(2) = 10 \). If \( f(x) \) has exactly one real root \( r \) in the interval \( (1, 2) \) and all other roots are non-real, find the sum of the coefficients of \( f(x) \).
v1
train
D
INVALID
INVALID
null
true
5050
q_046f7a7da54ba4af
null
Let \( f \) be a function defined on the set of non-negative integers with the following properties: 1. \( f(1) = 1 \) 2. \( f(a + b) = f(a) + f(b) + ab \) for all non-negative integers \( a \) and \( b \). Find the value of \( f(100) \).
v1
train
A
VALID
5050
1
true
Yes; the minimum total tax is 140500 gold coins.
q_0475cd7753fd15c7
null
In the kingdom of Numeralia, there are 1000 villages, each with a unique number from 1 to 1000. The king of Numeralia has issued a decree that every two villages are connected by a direct road if and only if the numbers of the two villages are relatively prime. A tourist, keen on exploring the kingdom, starts in villag...
v5
train
A
VALID
Yes; the minimum total tax is 140500 gold coins.
0.99
null
null
q_04b480470656a454
ambiguity
In a fictional kingdom, there are 20 cities connected by a network of roads such that every pair of cities is directly linked by exactly one road. A traveler wishes to visit each city exactly once, starting and ending at the same city. However, due to a peculiar law, the traveler cannot traverse the same road twice. Ho...
v3
train
C
INVALID
INVALID
null
true
7 integers; sum = 820
q_04d40aacb5898f02
null
In a particular infinite sequence of integers, each term is defined recursively by the formula \( a_{n} = 2a_{n-1} + 3a_{n-2} \) with initial conditions \( a_{0} = 1 \) and \( a_{1} = 2 \). Determine the number of integers between 1 and 1000 inclusive that can be expressed as a term in this sequence. Additionally, find...
v5
train
A
VALID
7 integers; sum = 820
1
null
null
q_0504bd28d08f48a7
ambiguity
In a hyperbolic plane, consider a regular polygon with \(n\) sides, where each internal angle is \(\alpha\). If the polygon is inscribed in a circle of radius \(r\) in this hyperbolic plane, find the relationship between \(n\), \(\alpha\), and \(r\). Specifically, derive a formula for \(n\) in terms of \(\alpha\) and \...
v4
train
C
INVALID
INVALID
null
null
null
q_053d2fc7701c5a85
contradiction
Find all real numbers \( x \) such that the sequence \( \{a_n\} \) defined by \( a_1 = x \) and \( a_{n+1} = a_n^2 - 2 \) for \( n \geq 1 \) converges to a limit \( L \) where \( L > 0 \) and \( L^2 = 2L + 1 \).
v3
train
D
INVALID
INVALID
null
true
1
q_055d3b97c9e3a46e
null
In the mystical land of Numeralia, a wise wizard has enchanted a magical forest with three types of trees: Aria Trees, Bora Trees, and Ciel Trees. The wizard has set a peculiar rule: every Aria Tree must be at least twice as tall as any Bora Tree, and every Bora Tree must be at least three times as tall as any Ciel Tre...
v3
train
A
VALID
1
0.99
null
null
q_058d698ad855a642
malformed
Let \( S \) be the set of all permutations of the set \( \{1, 2, 3, \ldots, 12\} \). For each permutation \( \sigma \in S \), let \( \sigma(n) \) denote the position of the number \( n \) in the permutation. Determine the number of permutations \( \sigma \) such that for every \( n \) and \( k \) in the set \( \{1, 2, ...
v3
train
E
INVALID
INVALID
null
true
n \in \{2,3,4,7\}
q_058f40b6b665501d
null
Find all positive integers \( n \) such that \( n^2 + 3n + 2 \) is divisible by \( n - 1 \).
v1
train
A
VALID
n \in \{2,3,4,7\}
1
null
null
q_0594e8f9f81730bd
malformed
In the complex plane, let $z_1, z_2, \ldots, z_n$ be $n$ distinct points such that the sum of any two points, when their product is taken modulo the prime number $p = 2023$, results in a perfect square. If $n = 2022$, determine the largest possible value of the expression: \[ \sum_{1 \le i < j \le 2022} \left| \frac{z_...
v4
train
E
INVALID
INVALID
null
null
null
q_05a8e02957fc54de
contradiction
In the mystical land of Mathemoria, the inhabitants have a unique way of celebrating the annual Unity Festival. They create a large, symmetrical pyramid of stones, where each stone is uniquely numbered from 1 to N (where N is an odd number). The stones are arranged in such a way that the base of the pyramid is a square...
v5
train
D
INVALID
INVALID
null
true
\frac{1}{3}
q_05bbf725d26ee45e
null
Let \( S \) be the set of all non-degenerate triangles with integer side lengths and a perimeter of 12. Determine the number of such triangles \( S \) that have an area that is an integer, and express your answer as a fraction of the total number of triangles in \( S \). Given the condition that the side lengths \( a,...
v2
train
A
VALID
\frac{1}{3}
1
true
1
q_05c383bf0cd2be83
null
What is the smallest positive integer \( n \) such that the sum of the squares of the first \( n \) positive integers is a perfect cube?
v1
train
A
VALID
1
1
true
No positive integers \(n\).
q_05c6c2c1e9b60936
null
Find all positive integers \( n \) such that \( 2^n + 3^n + 6^n + 7^n \) is a perfect square.
v2
train
A
VALID
No positive integers \(n\).
1
true
42
q_05dce082506413d2
null
In a unique calendrical system, each year is divided into cycles of \(13\) months, where each month has \(28\) days. Suppose a traditional festival is observed every \(3\) years in the current year. If the festival was held in year \(0\) and it has been observed on \(15\) distinct years, what is the smallest possible c...
v3
train
A
VALID
42
0.99
null
null
q_060f26a00aae4e71
contradiction
In the realm of abstract geometry, consider a tetrahedral complex \(T\) embedded in a three-dimensional space. \(T\) is composed of \(n\) tetrahedra, each defined by four non-coplanar points. Each edge of the tetrahedra is colored either red or blue, with no two adjacent edges sharing the same color. Moreover, no three...
v4
train
D
INVALID
INVALID
null
null
null
q_066e14ae8a652222
no_solution
Find the smallest positive integer \( n \) such that \( 3^n \) and \( 5^n \) both have exactly 2024 digits when expressed in base 10. Use this information to determine the last three digits of \( 15^n \).
v3
train
D
INVALID
INVALID
null
null
null
q_06832bef59da9713
missing_information
In a game where two players, A and B, take turns to remove one or two stones from a pile of n stones, the player who takes the last stone wins. However, if a player takes two stones, the other player must also take two stones on their next turn if possible. For which values of n between 1 and 100 inclusive can player A...
v3
train
C
INVALID
INVALID
null
null
null
q_06fbc1fa29d87213
no_solution
Let $ABC$ be a triangle with circumcircle $\omega$. Let $D$ be a point on the arc $BC$ not containing $A$ in $\omega$. The tangents to $\omega$ at $B$ and $D$ intersect at $E$. If $P$ and $Q$ are the feet of the perpendiculars from $A$ to $BD$ and $CE$ respectively, prove that $\angle APQ = \angle AQP$.
v1
train
D
INVALID
INVALID
null
null
null
q_070a91a31ab26443
contradiction
A finite sequence of non-zero digits is formed by concatenating all positive integers in increasing order, i.e., "123456789101112..." Continue this sequence infinitely. What is the 1000th digit of this sequence?
v2
train
D
INVALID
INVALID
null
null
null
q_070e9d0d30f3b138
ambiguity
在一个无限大的网格棋盘上,每个格子可以被标记为黑或白。游戏开始时,从一个角落开始,黑白棋子交错地摆放在相邻的格子上,形成一种特殊的模式。游戏的目标是通过一系列合法操作尽可能多地改变棋盘的颜色。合法操作是指选择一条直线,将这条直线上所有的棋子颜色反转(即,如果一个格子原本是黑色,则变为白色;如果是白色,则变为黑色)。 具体规则如下: 1. 操作只能针对整个行或列,不能只针对单个格子。 2. 如果一个棋盘被操作后所有的棋子颜色都相同,则该棋盘被视为“成功”,并停止操作。 3. 为了增加游戏的趣味性和挑战性,定义一个“翻转数”(Flip Number)——这是指执行一次操作所需的棋子个数。例如,在一个 3x3 的棋盘上,翻转整行需要翻转...
v4
train
C
INVALID
INVALID
null
null
null
q_073ebba5ed6e340b
ambiguity
Let \( S \) be a set of \( n \) distinct positive integers, where \( n \geq 3 \). Define a function \( f: \mathcal{P}(S) \to \mathbb{Z} \) on the power set of \( S \) such that for any subset \( A \subseteq S \), \( f(A) \) is the number of ways to partition \( A \) into two non-empty subsets such that the sum of the e...
v4
train
C
INVALID
INVALID
null
null
null
q_07df57ba8647b728
contradiction
A regular octahedron is inscribed within a sphere such that all its vertices touch the sphere. Each edge of the octahedron is 1 unit long. A light source is placed at the center of the sphere, casting shadows of the octahedron onto a flat wall directly opposite the octahedron's vertex. What is the area of the shadow ca...
v5
train
D
INVALID
INVALID
null
null
null
q_07e5f5267175bc51
ambiguity
Three mathematicians, Alice, Bob, and Carol, each have a distinct positive integer on their foreheads, and they see each other's numbers. They are given the sum of the squares of their numbers but not the numbers themselves. They must simultaneously guess whether their own number is larger than or smaller than the aver...
v5
train
C
INVALID
INVALID
null
true
Exactly the integers whose decimal digits are obtained as follows: choose a finite list \(a_1,\ldots,a_r\in\{2,\ldots,9\}\), possibly empty, and include exactly \(m=\prod_{i=1}^r a_i-\sum_{i=1}^r a_i\) copies of the digit \(1\), in any order. Here the empty product is \(1\) and empty sum is \(0\), giving \(n=1\). No ze...
q_07fb384dd53e5418
null
Find all positive integers \( n \) such that \( n \) divides the product of its digits minus the sum of its digits, i.e., \( n \mid (d_1 \cdot d_2 \cdot \ldots \cdot d_k - (d_1 + d_2 + \ldots + d_k)) \), where \( d_1, d_2, \ldots, d_k \) are the digits of \( n \).
v2
train
A
VALID
Exactly the integers whose decimal digits are obtained as follows: choose a finite list \(a_1,\ldots,a_r\in\{2,\ldots,9\}\), possibly empty, and include exactly \(m=\prod_{i=1}^r a_i-\sum_{i=1}^r a_i\) copies of the digit \(1\), in any order. Here the empty product is \(1\) and empty sum is \(0\), giving \(n=1\). No ze...
0.99
null
null
q_08454bb1ce81845f
ambiguity
Consider a regular hexagon $ABCDEF$ with side length $10$. Each vertex is connected to every other vertex by a diagonal. Find the number of diagonals that intersect the interior of the hexagon, passing through more than two vertices. Additionally, determine the length of the longest diagonal that does not pass through ...
v2
train
C
INVALID
INVALID
null
null
null
q_086f92c0e1b4f9b1
no_solution
In the mystical land of Numeria, a peculiar tree grows called the "Tripletizer," whose fruits reveal a number when peeled. A wise sage, intrigued by the patterns in the numbers revealed, noticed that the Tripletizer's fruits displayed numbers in a sequence that adhered to the following rule: the $n^{th}$ fruit's number...
v5
train
D
INVALID
INVALID
null
true
10^\circ
q_0883e93bd725021a
null
In an isosceles triangle \(ABC\) with \(AB = AC\) and \(\angle BAC = 20^\circ\), point \(D\) is on \(AB\) such that \(AD = BC\). Additionally, point \(E\) is on \(AC\) such that \(AE = BD\). Find the measure of \(\angle ACD\).
v1
train
A
VALID
10^\circ
0.999
true
6
q_08c9a250498074ba
null
A positive integer \( n \) is called super-decomposable if \( n \) can be written as \( n = ab \), where \( a \) and \( b \) are integers greater than 1 such that \( \gcd(a, b) = 1 \). What is the smallest super-decomposable number?
v1
train
A
VALID
6
1
true
5508
q_08dd7d9695e709f1
null
In a complex hexagonal lattice, each node is connected to six neighboring nodes by edges. A particle starts at the center node and moves to one of its neighbors with equal probability at each step. It is known that the particle can revisit nodes it has already visited. How many distinct paths of exactly 5 steps can the...
v5
train
A
VALID
5508
0.99
null
null
q_091558d2240ba2c1
ambiguity
Let $P(x)$ be a polynomial with integer coefficients such that $P(10) = 1000$ and $P(100) = 100000$. Given that $P(x)$ has a degree of at most $5$, find the number of possible integer roots that $P(x)$ can have.
v2
train
C
INVALID
INVALID
null
true
541
q_09343e18de338536
null
A sequence of positive integers \(a_1, a_2, a_3, \ldots\) is defined recursively by \(a_1 = 2\), and for \(n \geq 2\), \(a_n\) is the smallest integer greater than \(a_{n-1}\) such that no term \(a_k\) (for \(1 \leq k < n\)) divides \(a_n\). Find the remainder when \(a_{100}\) is divided by 1000.
v1
train
A
VALID
541
1
true
990
q_098f566736dc6e57
null
In the plane, consider a set of $2021$ distinct points, no three of which are collinear. These points represent the vertices of a convex polygon. A "score" of a pair of points is defined as the number of triangles formed by these points with both vertices as vertices of one of the triangles. If the total score for all ...
v5
train
A
VALID
990
0.99
null
null
q_099b39b58307c919
no_solution
What is the smallest positive integer \(n\) such that for all integers \(a\) and \(b\) where \(1 \leq a < b < n\), the product \(ab\) is not divisible by \(n\), given that \(n\) is the product of two distinct primes, \(n = pq\) where \(p\) and \(q\) are prime numbers?
v4
train
D
INVALID
INVALID
null
true
n=9
q_09dee11b1ad72ee3
null
Find all positive integers \( n \) for which \( n^3 - 14n^2 + 53n - 72 \) is a perfect square.
v2
train
A
VALID
n=9
0.99
true
2023
q_09fa0495f139c00e
null
A sequence of positive integers \(a_1, a_2, a_3, \ldots, a_n\) is defined as follows: \(a_1 = 1\), \(a_2 = 2\), and for \(n \geq 3\), \(a_n\) is the smallest positive integer not among \(a_1, a_2, \ldots, a_{n-1}\) such that \(a_n\) is relatively prime to \(a_{n-1}\). Determine the value of \(a_{2023}\).
v1
train
A
VALID
2023
1
true
1/1
q_0a1251cf977abf69
null
Find the number of ordered pairs of positive integers $(m,n)$ such that the sum of the squares of $m$ and $n$ equals the sum of the cubes of $m$ and $n$. Express your answer as a common fraction.
v1
train
A
VALID
1/1
1
null
null
q_0a6f111ac5b78bb9
contradiction
Let \( f(x) \) be a polynomial of degree 3 such that \( f(1) = 1 \), \( f(2) = 4 \), \( f(3) = 9 \), and \( f(4) = 16 \). Find the value of \( f(5) \).
v1
train
D
INVALID
INVALID
null
null
null
q_0aa39f15e0684a2d
ambiguity
在三维欧几里得空间中,考虑所有单位向量 $\mathbf{u} = (x, y, z)$ 满足条件 $|x| + |y| + |z| \leq 1$。设 $S$ 为这些单位向量的集合。现在,从 $S$ 中随机选取一个点 $\mathbf{p}$,然后沿着从原点到 $\mathbf{p}$ 的直线方向飞行,飞行的距离等于从原点到 $\mathbf{p}$ 的距离。求在飞行过程中,与初始位置相距不超过单位距离的所有可能终点的体积,表示为 $V$。设 $V$ 的值为 $A\pi + B\sqrt{C} + D\sqrt{E}$,其中 $A, B, C, D, E$ 是整数,且 $C$ 和 $E$ 无平方因子。求 $A + B + C + ...
v5
train
C
INVALID
INVALID
null
true
Countably infinitely many
q_0ab1a56491e29270
null
Find the number of ordered pairs \((a, b)\) of integers such that the equation \[ x^2 + ax + b = 0 \] has integer roots and the sum of the roots is a multiple of 10.
v1
train
A
VALID
Countably infinitely many
1
true
2
q_0ab6e4b0143a3a45
null
Find the number of real solutions to the equation \( x^{10} + 9x^9 + 14x^8 + 1 = 0 \).
v1
train
A
VALID
2
0.99
null
null
q_0ab93b1ca1d4909f
ambiguity
在无限大的棋盘上,有n个棋子,每个棋子的位置由整数坐标(x,y)表示。这些棋子之间的曼哈顿距离(|x1-x2| + |y1-y2|)大于等于k。给定n和k,请设计一个算法来确定是否可以将这n个棋子放置在一个方形网格(边长为整数)内,并且这个网格满足所有棋子之间的最小曼哈顿距离至少为k。如果可以找到这样的网格,请返回网格的最小边长;如果不能,返回-1。
v5
train
C
INVALID
INVALID
null
null
null
q_0abe71a23db1c2fa
contradiction
In a mystical village, there exists a tree with a unique property: it grows fruits in such a way that the number of fruits in each generation follows a specific mathematical pattern. The tree starts with 1 fruit in the first generation. In the second generation, it doubles the number of fruits to 2. From the third gene...
v5
train
D
INVALID
INVALID
null
null
null
q_0b01a890d5a3c073
no_solution
In a peculiar country, there exists a set of \(n\) cities, each connected by a unique bidirectional road to every other city. Each road has an associated cost, and it's known that the total sum of all road costs is divisible by 7. A traveler wishes to visit all \(n\) cities exactly once and return to the starting city,...
v5
train
D
INVALID
INVALID
null
null
null
q_0b6d79b4c821edf9
contradiction
In the Cartesian plane, a particle moves from the origin \( (0, 0) \) to the point \( (n, n) \) by taking unit steps either right or up, and then from \( (n, n) \) to \( (2n, 0) \) by taking unit steps either left or down. Let \( P_n \) be the number of distinct paths the particle can take. Prove that \( P_n \) is divi...
v2
train
D
INVALID
INVALID
null
true
4\sqrt{2}
q_0b76e8eb7817eb69
null
Let $f(x) = x^4 - 4x^3 + 10x^2 - 12x + 9$ be a polynomial with integer coefficients. Suppose that $r_1, r_2, r_3, r_4$ are the roots of $f(x)$, not necessarily distinct, in the complex plane. Find the smallest possible value of $$ |r_1 - r_2| + |r_2 - r_3| + |r_3 - r_4| + |r_4 - r_1| $$ where $| \cdot |$ denotes the co...
v4
train
A
VALID
4\sqrt{2}
0.99
null
null
q_0b861bfab252d432
ambiguity
在平面上有 \(n\) 条互不相同的直线,每条直线将平面分为两个半平面。这些直线最多能将平面分成多少个区域?已知 \(n \geq 3\),且任意三条直线不共点。此外,给出任意一条直线和所有其他直线交点的坐标,请求出所有区域的面积之和。
v4
train
C
INVALID
INVALID
null
null
null
q_0b948e8660937e56
no_solution
In a unique coordinate system on a sphere of radius \(R\), every point on the surface is defined by its spherical coordinates \((\theta, \phi)\), where \(\theta\) is the polar angle (ranging from \(0\) to \(\pi\)) and \(\phi\) is the azimuthal angle (ranging from \(0\) to \(2\pi\)). Consider a set of \(n\) points on th...
v3
train
D
INVALID
INVALID
null
true
0
q_0bb21cfe1d36e0d4
null
In the sequence \( a_n \) defined by \( a_1 = 1 \) and \( a_{n+1} = a_n + \frac{1}{a_n} \) for all \( n \geq 1 \), determine the integer part of the sum \( \sum_{k=1}^{100} \left( \frac{1}{a_k + a_{k+1}} \right)^2 \).
v2
train
A
VALID
0
0.99
true
Infinitely many (all integers k \ge 0)
q_0bcf3de40388ac9b
null
In a sequence of positive integers \(a_1, a_2, \ldots, a_{2023}\), each term \(a_n\) satisfies \(a_n = n^2 + k\) for some fixed integer \(k\). It is known that for each \(n\), \(a_n\) divides the product of the first \(n\) terms of the sequence, \(a_1 a_2 \cdots a_n\). Find the number of distinct possible values of \(k...
v2
train
A
VALID
Infinitely many (all integers k \ge 0)
1
null
null
q_0befc6a3c3d6cf65
missing_information
In the Cartesian plane, consider a circle centered at the origin with radius 1. Two distinct points \(A\) and \(B\) lie on this circle such that the line segment \(AB\) subtends an angle \(\theta\) at the center of the circle, where \(0 < \theta < \pi\). If the product of the \(y\)-coordinates of \(A\) and \(B\) is equ...
v1
train
C
INVALID
INVALID
null
true
Take c=2ab+1=ab+(ab+1). Then c∈S, while c≡1 (mod a) and c≡1 (mod b), so neither a nor b divides c.
q_0c49af70e867e2e2
null
Let \( S \) be the set of all positive integers that can be represented as the sum of two or more consecutive positive integers, starting from some integer \( n \geq 1 \). For example, \( 9 \) is in \( S \) because it can be written as \( 2 + 3 + 4 \). Prove that if \( a \) and \( b \) are two distinct elements of \( S...
v3
train
A
VALID
Take c=2ab+1=ab+(ab+1). Then c∈S, while c≡1 (mod a) and c≡1 (mod b), so neither a nor b divides c.
1
null
null
q_0c6db88f38b2af2d
no_solution
A sequence of positive integers is defined by \( a_1 = 1 \), \( a_2 = 2 \), and for \( n \geq 3 \), \( a_n = a_{n-1} + a_{n-2} + d_n \), where \( d_n \) is the smallest positive integer not appearing earlier in the sequence that is also not a multiple of any previous \( a_i \). Find \( a_{10} \).
v2
train
D
INVALID
INVALID
null
null
null
q_0c743595f63c5f50
missing_information
In a small village, there are 100 families. Each family has either 1, 2, or 3 children. The total number of children in the village is exactly 200. If each family with 2 children has exactly 1 dog, and each family with 3 children has exactly 2 dogs, how many dogs are there in the village?
v1
train
C
INVALID
INVALID
null
true
198
q_0c99039330c6eb97
null
Find the number of ordered pairs \((a, b)\) of positive integers such that \(a, b \leq 100\) and \(ab = \left\lfloor \frac{a}{b} \right\rfloor + \left\lfloor \frac{b}{a} \right\rfloor\).
v2
train
A
VALID
198
1
true
1
q_0cbb36c23537a5d1
null
Find the smallest positive integer \( n \) such that \( 2^n + n \) is divisible by \( n \).
v2
train
A
VALID
1
1
true
189
q_0ccff4ef912533e3
null
Let \( S \) be the set of all positive integers that are multiples of 3 but not of 5. Define a sequence \( \{a_n\} \) such that \( a_n \) is the smallest element in \( S \) that can be expressed as the sum of \( n \) distinct elements from \( S \). Find \( a_{10} \).
v2
train
A
VALID
189
0.99
true
1633
q_0ce928e9cd6f75c6
null
Let $S$ be a set of 100 points in the plane such that no three points are collinear and the distance between any two points is at least 1 unit. A subset $T$ of $S$ is called a "triangulation" if $T$ consists of exactly 99 points and any two points in $T$ can be connected by a straight line segment that does not pass th...
v4
train
A
VALID
1633
0.99
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R-Zero Validity-RL Terra Clean v1

Conservative clean Terra validity dataset used for Solver initialization in R-Quest.

Paper · Code · Project Page

excluded_valid.jsonl, manifest.json, and analysis/ are audit artifacts and are not training splits.

Citation

@misc{li2026rquest,
  title={Questioning the Questions: Sustaining Self-Evolution in Reasoning Models},
  author={Jinyuan Li and Chengsong Huang and Langlin Huang and Donghong Cai and Shiping Gao and Yuyi Yang and Jiaxin Huang},
  year={2026},
  eprint={2610.04299},
  archivePrefix={arXiv},
  primaryClass={cs.LG},
  url={https://arxiv.org/abs/2610.04299}
}
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