29 April 2020

• 11:3611:36, 29 April 2020 diff hist +55 Mathematics summer program →Math programs for middle school students

30 December 2019

• 20:3220:32, 30 December 2019 diff hist +10 Physics books →Undergraduate Level Books
• 20:3120:31, 30 December 2019 diff hist −2 Physics books →Undergraduate Level Books
• 20:3120:31, 30 December 2019 diff hist +542 Physics books →Books by subject

5 August 2019

• 09:1109:11, 5 August 2019 diff hist +109 2011 AMC 12B Problems/Problem 10 →Solution

22 June 2019

• 18:2118:21, 22 June 2019 diff hist 0 m 2015 AIME II Problems/Problem 11 →Solution 1
• 16:2616:26, 22 June 2019 diff hist 0 m 2011 USAMO Problems/Problem 5 →Solution 2
• 16:2616:26, 22 June 2019 diff hist +35 m 2011 USAMO Problems/Problem 5 →Solution 2

17 April 2019

• 11:5711:57, 17 April 2019 diff hist +273 2016 AMC 12B Problems/Problem 22 →Solution

17 September 2018

• 17:4917:49, 17 September 2018 diff hist −2 2017 USAJMO Problems/Problem 5 →Solution

2 March 2018

• 14:4914:49, 2 March 2018 diff hist +56 AMC historical results →AMC 12A

18 February 2018

• 11:5911:59, 18 February 2018 diff hist −5 2013 AIME II Problems/Problem 14 →Easy solution without strict proof

8 February 2018

• 17:0017:00, 8 February 2018 diff hist −2 m 2011 AMC 10A Problems/Problem 16 →Solution 2

12 September 2017

• 14:3914:39, 12 September 2017 diff hist +1 m 2004 AMC 12A Problems/Problem 18 →Solution 5

31 May 2017

• 12:2812:28, 31 May 2017 diff hist +2 m AoPS Wiki:Competition ratings →Scale

28 February 2017

• 13:4513:45, 28 February 2017 diff hist −3 AoPS Wiki:Competition ratings →USAJMO
• 13:4513:45, 28 February 2017 diff hist +3 AoPS Wiki:Competition ratings →USAJMO