28 December 2020

• 23:5323:53, 28 December 2020 diff hist +70 m 2018 AMC 12A Problems/Problem 23 →Solution

29 February 2020

• 22:2922:29, 29 February 2020 diff hist +26 2018 AIME II Problems/Problem 4 →Solution

25 January 2020

• 18:0618:06, 25 January 2020 diff hist 0 2017 AMC 12A Problems/Problem 23 →Video Solution

19 January 2020

• 22:2122:21, 19 January 2020 diff hist +347 2011 AMC 12B Problems/Problem 23 →Solution
• 22:1222:12, 19 January 2020 diff hist +1 m 2011 AMC 12B Problems/Problem 23 →Solution
• 22:1122:11, 19 January 2020 diff hist −1 2011 AMC 12B Problems/Problem 23 →Solution
• 22:1022:10, 19 January 2020 diff hist −21 2011 AMC 12B Problems/Problem 23 →Solution
• 22:1022:10, 19 January 2020 diff hist +664 2011 AMC 12B Problems/Problem 23 →Solution
• 21:5021:50, 19 January 2020 diff hist +6 m 2011 AMC 12B Problems/Problem 23 →Solution
• 21:3321:33, 19 January 2020 diff hist +110 2011 AMC 12B Problems/Problem 23 →Solution

12 January 2020

• 22:1322:13, 12 January 2020 diff hist +1 m 2010 AMC 12A Problems/Problem 22 →Solution 1

31 December 2019

• 22:1122:11, 31 December 2019 diff hist +4 m 2007 AMC 12B Problems/Problem 20 →Solution