26 January 2019

• 12:1212:12, 26 January 2019 diff hist −7 2015 AMC 10A Problems/Problem 7 →Solution 3
• 12:1112:11, 26 January 2019 diff hist +220 2015 AMC 10A Problems/Problem 7 →Solution 4

16 January 2019

• 08:2308:23, 16 January 2019 diff hist −7 2017 AMC 10B Problems/Problem 21 →Solution
• 08:2208:22, 16 January 2019 diff hist +1 m 2017 AMC 10B Problems/Problem 21 →Solution
• 08:2108:21, 16 January 2019 diff hist +65 m 2017 AMC 10B Problems/Problem 21 →Solution

6 January 2019

• 11:1011:10, 6 January 2019 diff hist −8 m 2011 AMC 10A Problems/Problem 19 →Solution 2

24 July 2018

• 13:0113:01, 24 July 2018 diff hist 0 m 2000 AMC 12 Problems/Problem 12 →Solution 1