# User contributions

(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)

- 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) - 21:26, 15 October 2013
(diff | hist) . .
**(+706)** . . N 2006 SMT/General Problems/Problem 2 (Created page with "==Problem== A customer enters a supermarket. The probability that the customer buys bread is <math>0.60</math>, the probability that the customer buys milk is <math>0.50</math>, ...") (current) - 21:15, 15 October 2013 (diff | hist) . . (+427) . . N 2006 SMT/General Problems/Problem 1 (Created page with "==Problem== After a cyclist has gone <math>\frac{2}{3}</math> of his route, he gets a flat tire. Finishing on foot, he spends twice as long walking as he did riding. How many tim...") (current)
- 21:06, 14 October 2013 (diff | hist) . . (0) . . m 2002 USAMO Problems/Problem 5 (→Problem)
- 21:03, 14 October 2013 (diff | hist) . . (+124) . . N Even function (Created page with "An '''even function''' is one that satisfies <math>f(x)=f(-x)</math> ==See Also== *Function *Odd function {{stub}}")
- 21:01, 14 October 2013 (diff | hist) . . (+348) . . N Odd function (Created page with "An '''odd function''' <math>f</math> satisfies both <math>f(x)+f(-x)=0</math> and <math>-f(x)=f(-x)</math>. For instance, <math>f(x)=3</math> does not satisfy either, as <math>3...") (current)
- 21:00, 14 October 2013 (diff | hist) . . (+37) . . Function (→See also)
- 20:47, 14 October 2013 (diff | hist) . . (+154) . . Quaternion (current)
- 04:43, 14 October 2013 (diff | hist) . . (+79) . . 1966 IMO Problems/Problem 3
- 04:42, 14 October 2013 (diff | hist) . . (+79) . . 1966 IMO Problems/Problem 2
- 04:40, 14 October 2013 (diff | hist) . . (0) . . 1966 IMO Problems/Problem 1
- 04:40, 14 October 2013 (diff | hist) . . (+28) . . 1966 IMO Problems/Problem 1
- 04:38, 14 October 2013 (diff | hist) . . (+65) . . 1966 IMO Problems/Problem 1
- 04:34, 14 October 2013 (diff | hist) . . (+1) . . m 1966 IMO Problems (→Problem 1)
- 04:33, 14 October 2013 (diff | hist) . . (+60) . . 1966 IMO Problems
- 04:32, 14 October 2013 (diff | hist) . . (+9) . . m 1966 IMO (current)
- 04:20, 14 October 2013 (diff | hist) . . (+8) . . Proof by contradiction (→Euclid's proof of the infinitude of primes)
- 04:20, 14 October 2013 (diff | hist) . . (+8) . . Proof by contradiction (→Proof that the square root of 2 is irrational)
- 00:51, 14 October 2013 (diff | hist) . . (+34) . . m 2011 AMC 10A Problems/Problem 7
- 00:49, 14 October 2013 (diff | hist) . . (+91) . . m 1995 AHSME Problems/Problem 6 (→Solution) (current)
- 01:08, 12 October 2013 (diff | hist) . . (+20) . . m Singapore mathematics competitions
- 01:01, 12 October 2013 (diff | hist) . . (+141) . . m Singapore mathematics competitions
- 00:57, 12 October 2013 (diff | hist) . . (-87) . . Singapore mathematics competitions
- 00:48, 12 October 2013 (diff | hist) . . (+52) . . m Primary Mathematics World Contest (→See also)
- 00:45, 12 October 2013
(diff | hist) . .
**(+1,565)** . . N 2013 PMWC (Created page with "== Problem I1 == Solution == Problem I2 == Solution == Problem I3 == [[2013 PMWC Problems/Problem I3|Solu...") - 00:45, 12 October 2013
(diff | hist) . .
**(+1,565)** . . N 2012 PMWC (Created page with "== Problem I1 == Solution == Problem I2 == Solution == Problem I3 == [[2012 PMWC Problems/Problem I3|Solu...") - 00:44, 12 October 2013
(diff | hist) . .
**(+1,565)** . . N 2011 PMWC (Created page with "== Problem I1 == Solution == Problem I2 == Solution == Problem I3 == [[2011 PMWC Problems/Problem I3|Solu...") - 00:44, 12 October 2013
(diff | hist) . .
**(+1,565)** . . N 2010 PMWC (Created page with "== Problem I1 == Solution == Problem I2 == Solution == Problem I3 == [[2010 PMWC Problems/Problem I3|Solu...") - 00:43, 12 October 2013
(diff | hist) . .
**(+1,565)** . . N 2009 PMWC (Created page with "== Problem I1 == Solution == Problem I2 == Solution == Problem I3 == [[2009 PMWC Problems/Problem I3|Solu...") - 00:42, 12 October 2013
(diff | hist) . .
**(+1,565)** . . N 2008 PMWC (Created page with "== Problem I1 == Solution == Problem I2 == Solution == Problem I3 == [[2008 PMWC Problems/Problem I3|Solu...") - 00:41, 12 October 2013 (diff | hist) . . (+96) . . m PMWC Problems and Solutions (current)

(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)