User contributions
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- 09:52, 22 July 2025 (diff | hist) . . (+2) . . 2025 IMO Problems/Problem 1 (current)
- 05:17, 17 July 2025 (diff | hist) . . (+64) . . 2025 IMO Problems/Problem 6
- 07:26, 16 July 2025 (diff | hist) . . (-9) . . 2025 IMO Problems/Problem 5
- 06:57, 16 July 2025 (diff | hist) . . (+19) . . 2025 IMO Problems/Problem 5
- 06:56, 16 July 2025 (diff | hist) . . (+932) . . N 2025 IMO Problems/Problem 5 (Created page with "Alice and Bazza are playing the inekoalaty game, a two‑player game whose rules depend on a positive real number <math>\lambda</math> which is known to both players. On the <...")
- 03:18, 16 July 2025 (diff | hist) . . (+505) . . N 2025 IMO Problems/Problem 4 (Created page with "A proper divisor of a positive integer <math>N</math> is a positive divisor of <math>N</math> other than <math>N</math> itself. The infinite sequence <math>a_1,a_2,\dots</mat...")
- 21:57, 15 July 2025 (diff | hist) . . (+64) . . 2025 IMO Problems/Problem 3
- 08:14, 15 July 2025 (diff | hist) . . (0) . . 2025 IMO
- 08:13, 15 July 2025 (diff | hist) . . (+987) . . N 2025 IMO Problems/Problem 2 (Created page with "Let <math>\Omega</math> and <math>\Gamma</math> be circles with centres <math>M</math> and <math>N</math>, respectively, such that the radius of <math>\Omega</math> is less th...")
- 03:00, 15 July 2025 (diff | hist) . . (+37) . . 2025 IMO
- 02:59, 15 July 2025 (diff | hist) . . (-599) . . 2025 IMO
- 02:57, 15 July 2025 (diff | hist) . . (+2) . . 2024 IMO Problems/Problem 1 (current)
- 02:56, 15 July 2025 (diff | hist) . . (+685) . . N 2025 IMO Problems/Problem 1 (Created page with "A line in the plane is called <math>sunny</math> if it is not parallel to any of the <math>x</math>–axis, the <math>y</math>–axis, or the line <math>x+y=0</math>. Let <ma...")
- 02:53, 15 July 2025 (diff | hist) . . (+319) . . IMO Problems and Solutions
- 21:22, 29 August 2024 (diff | hist) . . (+14) . . 2024 IMO Problems/Problem 5
- 21:22, 29 August 2024 (diff | hist) . . (+64) . . 2024 IMO Problems/Problem 4
- 21:21, 29 August 2024 (diff | hist) . . (+1) . . 2024 IMO Problems/Problem 2
- 02:33, 20 July 2024 (diff | hist) . . (+49) . . 2024 IMO Problems/Problem 6
- 05:09, 19 July 2024 (diff | hist) . . (+92) . . 2024 IMO Problems/Problem 5
- 04:07, 19 July 2024 (diff | hist) . . (+1,110) . . N 2024 IMO Problems/Problem 5 (Created page with "Turbo the snail plays a game on a board with 2024 rows and 2023 columns. There are hidden monsters in 2022 of the cells. Initially, Turbo does not know where any of the monste...")
- 03:46, 19 July 2024 (diff | hist) . . (+48) . . 2024 IMO Problems/Problem 4
- 05:33, 18 July 2024 (diff | hist) . . (-5) . . 2024 IMO Problems/Problem 3
- 03:59, 18 July 2024 (diff | hist) . . (+72) . . 2024 IMO Problems/Problem 3
- 09:27, 17 July 2024 (diff | hist) . . (+312) . . IMO Problems and Solutions
- 09:24, 17 July 2024 (diff | hist) . . (+106) . . 2024 IMO Problems/Problem 2
- 08:56, 17 July 2024 (diff | hist) . . (+64) . . 2024 IMO Problems/Problem 1
- 09:09, 5 April 2024 (diff | hist) . . (+49) . . 2024 USAMO Problems/Problem 2
- 21:55, 29 March 2024 (diff | hist) . . (+90) . . 2024 USAMO Problems/Problem 4
- 21:55, 29 March 2024 (diff | hist) . . (+90) . . 2024 USAMO Problems/Problem 1
- 21:52, 19 August 2023 (diff | hist) . . (+143) . . APMO Problems and Solutions (current)
- 21:51, 19 August 2023 (diff | hist) . . (+2) . . 2023 APMO Problems/Problem 2 (current)
- 21:51, 19 August 2023 (diff | hist) . . (+12) . . 2023 APMO Problems/Problem 2
- 21:51, 19 August 2023 (diff | hist) . . (+318) . . N 2023 APMO Problems/Problem 2 (Created page with "==Problem== Find all integers <math>n</math> satisfying <math>n \ge 2</math> and <math>\frac{\sigma(n)}{p(n)-1}, in which </math>\sigma(n)<math> denotes the sum of all positi...")
- 21:49, 19 August 2023 (diff | hist) . . (+486) . . N 2023 APMO Problems/Problem 1 (Created page with "==Problem== Let <math>n\ge 5</math> be an integer. Consider <math>n</math> squares with side lengths <math>1, 2, \dots , n</math>, respectively. The squares are arranged in t...") (current)
- 21:48, 19 August 2023 (diff | hist) . . (+113) . . APMO Problems and Solutions
- 09:43, 8 August 2023 (diff | hist) . . (+7) . . 2023 IMO Problems/Problem 2
- 09:43, 8 August 2023 (diff | hist) . . (0) . . 2023 IMO Problems/Problem 2
- 23:19, 20 July 2023 (diff | hist) . . (0) . . 2023 IMO Problems/Problem 1
- 07:14, 14 July 2023 (diff | hist) . . (+1) . . 2023 IMO Problems/Problem 6
- 07:14, 14 July 2023 (diff | hist) . . (+862) . . N 2023 IMO Problems/Problem 6 (Created page with "==Problem== Let <math>ABC</math> be an equilateral triangle. Let <math>A_1,B_1,C_1</math> be interior points of <math>ABC</math> such that <math>BA_1=A_1C</math>, <math>CB_1=B...")
- 07:13, 14 July 2023 (diff | hist) . . (+58) . . 2023 IMO Problems/Problem 5
- 07:12, 14 July 2023 (diff | hist) . . (-1,499) . . 2023 IMO Problems/Problem 5
- 07:12, 14 July 2023 (diff | hist) . . (+1,499) . . 2023 IMO Problems/Problem 5
- 07:12, 14 July 2023 (diff | hist) . . (+838) . . N 2023 IMO Problems/Problem 5 (Created page with "==Problem== Let <math>n</math> be a positive integer. A Japanese triangle consists of <math>1 + 2 + \dots + n</math> circles arranged in an equilateral triangular shape such t...")
- 07:10, 14 July 2023 (diff | hist) . . (+113) . . 2023 IMO Problems/Problem 4
- 09:42, 9 July 2023 (diff | hist) . . (+558) . . N 2023 IMO Problems/Problem 3 (Created page with "==Problem== For each integer <math>k \geqslant 2</math>, determine all infinite sequences of positive integers <math>a_1, a_2, \ldots</math> for which there exists a polynomia...")
- 09:42, 9 July 2023 (diff | hist) . . (+949) . . N 2023 IMO Problems/Problem 2 (Created page with "==Problem== Let <math>ABC</math> be an acute-angled triangle with <math>AB < AC</math>. Let <math>\Omega</math> be the circumcircle of <math>ABC</math>. Let <math>S</math> be...")
- 09:40, 9 July 2023 (diff | hist) . . (+426) . . N 2023 IMO Problems/Problem 1 (Created page with "==Problem== Determine all composite integers <math>n>1</math> that satisfy the following property: if <math>d_1,d_2,\dots,d_k</math> are all the positive divisors of <math>n</...")
- 09:37, 9 July 2023 (diff | hist) . . (+315) . . IMO Problems and Solutions
- 09:24, 23 June 2023 (diff | hist) . . (0) . . 2021 IMO Shortlist Problems/C2 (→Problem) (current)
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