13 December 2019

• 01:0101:01, 13 December 2019 diff hist +1,233 2011 AIME II Problems/Problem 6 →Solution 4 (quick)

10 March 2019

• 12:1212:12, 10 March 2019 diff hist 0 2018 AIME I Problems/Problem 1 →Solution 3
• 12:1212:12, 10 March 2019 diff hist 0 2018 AIME I Problems/Problem 1 →Solution 2 (less complicated)
• 12:1212:12, 10 March 2019 diff hist +2 2018 AIME I Problems/Problem 1 →Solution
• 12:1212:12, 10 March 2019 diff hist +431 2018 AIME I Problems/Problem 1 →Solution

24 October 2018

• 09:5709:57, 24 October 2018 diff hist +189 2016 AMC 8 Problems/Problem 3 →Solution

31 July 2018

• 23:5223:52, 31 July 2018 diff hist +8 2012 AMC 12B Problems/Problem 13 →Solution 1

6 April 2018

• 22:2122:21, 6 April 2018 diff hist +559 2014 AMC 10A Problems/Problem 21 →Solution
• 20:1620:16, 6 April 2018 diff hist +295 2014 AMC 10A Problems/Problem 15 →Solution 2 (Answer Choices)

18 March 2018

• 21:2121:21, 18 March 2018 diff hist +737 2015 AIME II Problems/Problem 5 →Solution 2

17 March 2018

• 13:4813:48, 17 March 2018 diff hist +425 2015 AIME II Problems/Problem 2 →Solution

11 March 2018

• 14:0314:03, 11 March 2018 diff hist +578 2014 AIME I Problems/Problem 3 →Solution 3