12 March 2020

• 16:4316:43, 12 March 2020 diff hist −14 2020 AIME I Problems/Problem 12 →Solution
• 16:4316:43, 12 March 2020 diff hist +14 m 2020 AIME I Problems/Problem 12 →Solution

13 December 2019

• 18:2918:29, 13 December 2019 diff hist −3 2019 AMC 8 Problems/Problem 19 →Solution 2
• 14:2314:23, 13 December 2019 diff hist +12 2019 AMC 8 Problems/Problem 19 →Solution 2

12 December 2019

• 19:2019:20, 12 December 2019 diff hist −3 2019 AMC 8 Problems/Problem 19 →Solution 2

1 October 2019

• 10:0210:02, 1 October 2019 diff hist +15 2017 JBMO Problems/Problem 2 →Solution

22 September 2019

• 10:5610:56, 22 September 2019 diff hist +17 2019 AIME II Problems/Problem 11 →Solution 2

3 July 2019

• 11:4611:46, 3 July 2019 diff hist 0 2018 AIME I Problems/Problem 7 →Solution 2

11 June 2019

• 14:4714:47, 11 June 2019 diff hist 0 m 2019 USAJMO Problems/Problem 1 →Solution 2