12 February 2019

• 22:0822:08, 12 February 2019 diff hist +21 2019 AMC 10A Problems/Problem 25 →Solution

8 March 2018

• 12:1612:16, 8 March 2018 diff hist +597 2010 USAMO Problems/Problem 1 →Solution

18 May 2017

• 21:1821:18, 18 May 2017 diff hist +448 1983 AIME Problems/Problem 14 →Solution

14 February 2017

• 22:0822:08, 14 February 2017 diff hist −2 2012 AMC 10A Problems/Problem 19 →Solution

12 February 2017

• 13:3713:37, 12 February 2017 diff hist +1 2013 AMC 10A Problems/Problem 20 →Solution 1

30 January 2017

• 19:1719:17, 30 January 2017 diff hist +6 m 1983 AIME Problems/Problem 3 →Solution 2