User contributions
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- 06:46, 5 January 2014 (diff | hist) . . (+4) . . m 2000 AMC 12 Problems/Problem 15 (→Solution)
- 07:22, 11 December 2013 (diff | hist) . . (+4) . . m 1951 AHSME Problems/Problem 26 (→Solution)
- 07:12, 11 December 2013 (diff | hist) . . (+183) . . 1962 AHSME Problems/Problem 8
- 06:00, 5 December 2013 (diff | hist) . . (+8) . . m 1983 AIME Problems/Problem 10
- 06:08, 7 November 2013 (diff | hist) . . (+132) . . User:DANCH (current)
- 06:05, 7 November 2013 (diff | hist) . . (+133) . . Deficient number
- 05:58, 7 November 2013 (diff | hist) . . (+160) . . 2006 IMO Problems
- 04:10, 7 November 2013 (diff | hist) . . (+28) . . User:DANCH
- 06:50, 28 October 2013 (diff | hist) . . (+82) . . IMO Shortlist Problems
- 06:48, 28 October 2013 (diff | hist) . . (+504) . . N 2011 IMO Shortlist Problems/G8 (Created page with "Let <math>ABC</math> be an acute triangle with circumcircle <math>\Gamma</math>. Let <math>\ell</math> be a tangent line to <math>\Gamma</math>, and let <math>\ell_a, \ell_b</mat...") (current)
- 06:48, 28 October 2013 (diff | hist) . . (+400) . . N 2011 IMO Shortlist Problems/N5 (Created page with "Let <math>f</math> be a function from the set of integers to the set of positive integers. Suppose that, for any two integers <math>m</math> and <math>n</math>, the difference <m...") (current)
- 06:47, 28 October 2013 (diff | hist) . . (+533) . . N 2011 IMO Shortlist Problems/C1 (Created page with "Let <math>n > 0</math> be an integer. We are given a balance and <math>n</math> weights of weight <math>2^0,2^1, \cdots ,2^{n-1}</math>. We are to place each of the <math>n</mat...") (current)
- 06:46, 28 October 2013 (diff | hist) . . (+284) . . N 2011 IMO Shortlist Problems/A6 (Created page with "Let <math>f: \mathbb R \to \mathbb R</math> be a real-valued function defined on the set of real numbers that satisfies <cmath> f(x + y) \le yf(x) + f(f(x)) </cmath> for all real...") (current)
- 06:44, 28 October 2013 (diff | hist) . . (+889) . . N 2011 IMO Shortlist Problems/C3 (Created page with "Let <math>\mathcal{S}</math> be a finite set of at least two points in the plane. Assume that no three points of <math>\mathcal S</math> are collinear. A ''windmill'' is a proces...") (current)
- 06:44, 28 October 2013 (diff | hist) . . (+500) . . N 2011 IMO Shortlist Problems/A1 (Created page with "==Problem== Given any set <math>A = \{a_1, a_2, a_3, a_4\}</math> of four distinct positive integers, we denote the sum <math>a_1 +a_2 +a_3 +a_4</math> by <math>s_A</math>. Let <...") (current)
- 06:34, 28 October 2013 (diff | hist) . . (-1) . . 2000 AMC 12 Problems/Problem 12 (→Solution)
- 22:23, 25 October 2013 (diff | hist) . . (+22) . . Law of Tangents
- 22:17, 15 October 2013 (diff | hist) . . (+539) . . N 2006 SMT/General Problems/Problem 7 (Created page with "==Problem== An aircraft is equipped with three engines that operate independently. The probability of an engine failure is <math>.01</math>. What is the probability of a successf...") (current)
- 22:01, 15 October 2013 (diff | hist) . . (+427) . . N 2006 SMT/General Problems/Problem 5 (Created page with "==Problem== A geometric series is one where the ratio between each two consecutive terms is constant <math>(ex. 3, 6, 12, 24,\cdots)</math>. The fifth term of a geometric series ...") (current)
- 21:45, 15 October 2013 (diff | hist) . . (+607) . . N 2006 SMT/General Problems/Problem 3 (Created page with "==Problem== After a typist has written ten letters and had addressed the ten corresponding envelopes, a careless mailing clerk inserted the letters in the envelopes at random, on...") (current)
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