16 July 2021

• 13:3513:35, 16 July 2021 diff hist −488 2021 AMC 12A Problems/Problem 21 →Solution 2 (Three Variables, Three Equations)

10 July 2021

• 10:5110:51, 10 July 2021 diff hist +101 2018 AMC 10B Problems/Problem 25 →Solution 1

8 July 2021

• 16:4716:47, 8 July 2021 diff hist −84 2020 AMC 10A Problems/Problem 25 →Solution 1

3 July 2021

• 18:4218:42, 3 July 2021 diff hist +120 2020 AMC 10B Problems/Problem 24 →Solution 1
• 18:4018:40, 3 July 2021 diff hist +110 2020 AMC 10B Problems/Problem 24 →Solution 1
• 18:3918:39, 3 July 2021 diff hist +23 2020 AMC 10B Problems/Problem 24 →Solution 1
• 16:5816:58, 3 July 2021 diff hist +4 2021 AMC 12B Problems/Problem 15 →Solution 1
• 07:1107:11, 3 July 2021 diff hist +32 2020 AMC 12B Problems/Problem 12 →Solution 3 (Law of Cosines)
• 07:1107:11, 3 July 2021 diff hist +15 2020 AMC 12B Problems/Problem 12 →Solution 3 (Law of Cosines)

28 June 2021

• 19:3419:34, 28 June 2021 diff hist +43 m 2021 AMC 12A Problems/Problem 17 →Solution 1
• 19:3219:32, 28 June 2021 diff hist −20 m 2021 AMC 12A Problems/Problem 17 →Solution 1
• 19:3219:32, 28 June 2021 diff hist 0 m 2021 AMC 12A Problems/Problem 17 →Solution 1

18 January 2021

• 21:5721:57, 18 January 2021 diff hist −10 m 2008 AMC 12B Problems/Problem 24 →Solution 2
• 21:5521:55, 18 January 2021 diff hist +36 2008 AMC 12B Problems/Problem 23 →Solution 1
• 21:5221:52, 18 January 2021 diff hist −6 2008 AMC 12B Problems/Problem 23 →Solution 1

9 January 2021

• 18:1818:18, 9 January 2021 diff hist 0 2015 AMC 12B Problems/Problem 24 →Solution 2

8 January 2021

• 11:3211:32, 8 January 2021 diff hist −121 2013 AMC 12B Problems/Problem 13 →Solution current

6 January 2021

• 13:0313:03, 6 January 2021 diff hist +13 m 2012 AMC 12A Problems/Problem 16 →Solution 1