19 October 2019

• 20:1620:16, 19 October 2019 diff hist −2 2019 AIME I Problems/Problem 14 →Note to solution 1

23 June 2019

• 13:0813:08, 23 June 2019 diff hist 0 2019 AMC 12A Problems/Problem 19 →Solution 3

12 October 2018

• 13:3113:31, 12 October 2018 diff hist +1 2014 AMC 12A Problems/Problem 24 →Problem
• 13:3013:30, 12 October 2018 diff hist 0 2014 AMC 12A Problems/Problem 24 →Problem

11 February 2018

• 10:4210:42, 11 February 2018 diff hist −1 2008 AIME II Problems/Problem 11 →Solution
• 10:4210:42, 11 February 2018 diff hist +1 2008 AIME II Problems/Problem 11 →Solution
• 10:4110:41, 11 February 2018 diff hist 0 2008 AIME II Problems/Problem 11 →Solution
• 10:4010:40, 11 February 2018 diff hist +1 2008 AIME II Problems/Problem 11 →Solution
• 10:3910:39, 11 February 2018 diff hist −1 2008 AIME II Problems/Problem 11 →Solution

6 November 2016

• 20:0820:08, 6 November 2016 diff hist −5 2013 AMC 10B Problems/Problem 22 →Solution 1
• 11:0011:00, 6 November 2016 diff hist −2 2014 AMC 10A Problems/Problem 23 →Solution 1
• 11:0011:00, 6 November 2016 diff hist +2 2014 AMC 10A Problems/Problem 23 →Solution 1