7 April 2019

• 21:1821:18, 7 April 2019 diff hist +28 m 2012 AMC 12B Problems/Problem 19 boxed the answer to make it more clear

18 October 2018

• 23:3923:39, 18 October 2018 diff hist +12 2013 AMC 8 Problems/Problem 21 →Solution

19 November 2017

• 22:5922:59, 19 November 2017 diff hist 0 N 1972 AHSME Problems/Problem 18 3 \frac{2}{3}

19 August 2017

• 19:4719:47, 19 August 2017 diff hist +17 Fermat's Little Theorem →Proof 4 (Geometry)
• 19:4719:47, 19 August 2017 diff hist +29 Fermat's Little Theorem →Proof