3 January 2021

• 21:2121:21, 3 January 2021 diff hist +2 m 2007 AMC 10B Problems/Problem 25 →Solution 5 (Similar to Solution 1)

1 January 2021

• 18:0018:00, 1 January 2021 diff hist +1 m 2008 AMC 10B Problems/Problem 24 →Solution 1

14 October 2019

• 16:0416:04, 14 October 2019 diff hist +2 m 2005 AMC 8 Problems/Problem 11 →Problem

16 July 2019

• 20:2120:21, 16 July 2019 diff hist 0 m 2006 AMC 10A Problems/Problem 8 →Solution 2

3 July 2019

• 12:5312:53, 3 July 2019 diff hist +1 m 2015 AMC 8 Problems/Problem 14 →Solution 4

24 June 2019

• 20:5520:55, 24 June 2019 diff hist 0 m 2004 AMC 12A Problems/Problem 18 →Solution 2

22 June 2019

• 20:5620:56, 22 June 2019 diff hist 0 m 2004 AMC 12A Problems/Problem 14 →Solution 3