15 December 2019

• 20:3120:31, 15 December 2019 diff hist +20 Wilson's Theorem →Introductory

11 May 2018

• 14:2714:27, 11 May 2018 diff hist +22 1995 USAMO Problems/Problem 4 →Solution current
• 14:2614:26, 11 May 2018 diff hist +2,055 1995 USAMO Problems/Problem 4 No edit summary

23 February 2018

• 18:5918:59, 23 February 2018 diff hist +1,213 2008 AIME II Problems/Problem 14 →Solution 2

14 February 2018

• 15:5515:55, 14 February 2018 diff hist −21 2017 AIME II Problems/Problem 13 →Solution 2 (elaborates on the possible cases)
• 15:5415:54, 14 February 2018 diff hist +3,907 2017 AIME II Problems/Problem 13 →Solution

25 November 2015

• 15:5415:54, 25 November 2015 diff hist +1,176 Mock AIME 1 2006-2007 Problems/Problem 7 →Solution current