12 July 2009

• 13:2913:29, 12 July 2009 diff hist +1,620 2003 USAMO Problems/Problem 6 →Solution

17 October 2008

• 18:3218:32, 17 October 2008 diff hist +2,739 N 2005 USAMO Problems/Problem 4 New page: =Problem= Legs <math>L_1, L_2, L_3, L_4</math> of a square table each have length <math>n</math>, where <math>n</math> is a positive integer. For how many ordered 4-tuples <math>(k_1, k...

22 March 2008

• 14:0014:00, 22 March 2008 diff hist +13 1993 USAMO Problems/Problem 1 No edit summary
• 13:5813:58, 22 March 2008 diff hist 0 1993 USAMO No edit summary
• 13:5813:58, 22 March 2008 diff hist +30 1993 USAMO No edit summary
• 13:5713:57, 22 March 2008 diff hist +1,025 N 1993 USAMO Problems/Problem 1 New page: ==Problem== For each integer <math>n\ge 2</math>, determine, with proof, which of the two positive real numbers <math>a</math> and <math>b</math> satisfying <cmath>a^n=a+1,\qquad b^{2n}=b+...
• 13:5013:50, 22 March 2008 diff hist −64 1993 USAMO No edit summary
• 13:5013:50, 22 March 2008 diff hist +8 1993 USAMO No edit summary
• 13:4913:49, 22 March 2008 diff hist +41 1993 USAMO No edit summary
• 13:4913:49, 22 March 2008 diff hist +28 N 1993 USAMO New page: ==1993 USAMO== Problem 1

22 February 2008

• 20:3720:37, 22 February 2008 diff hist +412 N 1992 USAMO Problems/Problem 3 New page: ==Problem== Chords <math>AA'</math>, <math>BB'</math>, and <math>CC'</math> of a sphere meet at an interior point <math>P</math> but are not contained in the same plane. The sphere throug...

20 February 2008

• 20:1720:17, 20 February 2008 diff hist +473 1992 USAMO Problems/Problem 2 No edit summary

27 January 2008

• 10:3610:36, 27 January 2008 diff hist +1,271 2006 AMC 12B Problems/Problem 21 No edit summary
• 10:1910:19, 27 January 2008 diff hist +16 AMC 12 →Format

19 January 2008

• 17:0917:09, 19 January 2008 diff hist +45 2007 AIME I Problems/Problem 14 →Solution

16 January 2008

• 17:4217:42, 16 January 2008 diff hist +19 2007 AIME I Problems/Problem 12 →Solution 4

15 January 2008

• 17:1417:14, 15 January 2008 diff hist +143 1989 USAMO Problems/Problem 1 No edit summary

13 January 2008

• 19:3919:39, 13 January 2008 diff hist +1,223 1991 USAMO Problems/Problem 1 No edit summary
• 19:2819:28, 13 January 2008 diff hist +246 N 1991 USAMO Problems/Problem 1 New page: == Problem == In triangle <math>ABC</math>, angle <math>A</math> is twice angle <math>B</math>, angle <math>C</math> is obtuse, and the three side lengths <math>a, b, c</math> are integer...
• 19:2519:25, 13 January 2008 diff hist +636 1989 USAMO Problems/Problem 2 No edit summary

3 January 2008

• 15:3615:36, 3 January 2008 diff hist +207 Carl Friedrich Gauss No edit summary