31 October 2018

• 18:1118:11, 31 October 2018 diff hist +137 N 2005 IMO Problems/Problem 4 Created page with "Determine all positive integers relatively prime to all the terms of the infinite sequence <cmath> a_n=2^n+3^n+6^n -1,\ n\geq 1. </cmath>"

19 October 2018

• 18:0418:04, 19 October 2018 diff hist 0 m 2017 USAMO Problems/Problem 1 →Solution 1

31 August 2018

• 15:5915:59, 31 August 2018 diff hist +856 2017 USAJMO Problems/Problem 5 →Solution

3 August 2018

• 16:4416:44, 3 August 2018 diff hist −2 m 2005 AIME I Problems/Problem 15 →Solution 2
• 16:2016:20, 3 August 2018 diff hist 0 m 2005 AIME I Problems/Problem 11 →Solution 1