14 February 2017

• 19:0719:07, 14 February 2017 diff hist +2 m 2011 AMC 10A Problems/Problem 21 →Solution 2

5 May 2016

• 21:2121:21, 5 May 2016 diff hist +3 2016 AMC 10B Problems/Problem 23 →Solution 2 (a lot faster than Solution 1)

13 February 2016

• 18:4718:47, 13 February 2016 diff hist +215 2009 AMC 10A Problems/Problem 5 →Solution

7 January 2016

• 01:3001:30, 7 January 2016 diff hist 0 2012 AMC 10B Problems/Problem 5 →Solutions

25 October 2015

• 22:3922:39, 25 October 2015 diff hist −16 m 2009 AMC 8 Problems/Problem 25 →Solution 1
• 22:3722:37, 25 October 2015 diff hist −16 m 2009 AMC 8 Problems/Problem 25 →Solution 1
• 22:3222:32, 25 October 2015 diff hist 0 m 2009 AMC 8 Problems/Problem 23 →Solution
• 18:4718:47, 25 October 2015 diff hist −4 m 2009 AMC 8 Problems/Problem 22 →Solution