14 March 2019

• 17:5517:55, 14 March 2019 diff hist +1 m 2019 AIME I Problems →Problem 8
• 17:5317:53, 14 March 2019 diff hist +61 2019 AIME I Problems/Problem 14 →Problem 14

30 January 2019

• 21:5621:56, 30 January 2019 diff hist −2 m 2008 AMC 12A Problems/Problem 25 →Solution 1

4 January 2019

• 23:3523:35, 4 January 2019 diff hist +1 m 2009 AMC 12B Problems →Problem 3
• 23:3423:34, 4 January 2019 diff hist −1 m 2009 AMC 12B Problems →Problem 3

27 October 2018

• 20:3320:33, 27 October 2018 diff hist +1 m 2010 AMC 12A Problems/Problem 21 →Solution 2

21 June 2018

• 19:0919:09, 21 June 2018 diff hist 0 1998 AIME Problems/Problem 13 →Solution
• 19:0919:09, 21 June 2018 diff hist 0 m 1998 AIME Problems/Problem 13 →Solution

17 March 2018

• 16:2316:23, 17 March 2018 diff hist +207 2009 AIME I Problems/Problem 10 →Solution

10 March 2018

• 17:0217:02, 10 March 2018 diff hist +150 m 2005 AIME II Problems/Problem 14 →Solution 2 (Similar Triangles)

16 February 2018

• 16:4716:47, 16 February 2018 diff hist 0 2018 AMC 10B Problems/Problem 21 →Solution 2
• 16:4716:47, 16 February 2018 diff hist 0 2018 AMC 10B Problems/Problem 21 →Solution 1

5 February 2018

• 20:5420:54, 5 February 2018 diff hist −13 2011 AMC 12B Problems/Problem 20 →Solution 1 (Coordinates)

18 December 2017

• 21:2021:20, 18 December 2017 diff hist +8 2007 AMC 12B Problems/Problem 17 →Problem 17
• 21:1921:19, 18 December 2017 diff hist −40 2007 AMC 12B Problems/Problem 17 →Problem 17
• 21:1821:18, 18 December 2017 diff hist −32 2007 AMC 12B Problems/Problem 16 →Problem 16
• 21:0521:05, 18 December 2017 diff hist −1 2007 AMC 12B Problems/Problem 20 →Solution
• 21:0521:05, 18 December 2017 diff hist −10 2007 AMC 12B Problems/Problem 20 →Solution 2
• 21:0521:05, 18 December 2017 diff hist −8 m 2007 AMC 12B Problems/Problem 20 →Solution

13 August 2017

• 22:0722:07, 13 August 2017 diff hist +37 2010 AIME II Problems/Problem 7 →Solution
• 22:0622:06, 13 August 2017 diff hist +13 2010 AIME II Problems/Problem 7 →Solution

2 March 2017

• 21:0121:01, 2 March 2017 diff hist −8 1997 AIME Problems/Problem 10 →Solution

25 February 2017

• 19:3919:39, 25 February 2017 diff hist +6 1995 AIME Problems/Problem 15 →Solution 3

16 January 2017

• 15:5515:55, 16 January 2017 diff hist 0 1984 AIME Problems/Problem 11 →Solution

15 January 2017

• 11:5811:58, 15 January 2017 diff hist +5 m 1984 AIME Problems/Problem 9 →Solution

7 January 2017

• 15:2215:22, 7 January 2017 diff hist +13 2015 AMC 10A Problems/Problem 17 →Solution 2

25 December 2015

• 20:1720:17, 25 December 2015 diff hist +13 m 2013 AMC 12B Problems/Problem 15 →Solution