User contributions
- 19:45, 9 September 2017 (diff | hist) . . (+663) . . 2011 AMC 12A Problems/Problem 19 (Added alternate solution)
- 13:30, 29 December 2016 (diff | hist) . . (0) . . m 2013 AIME II Problems/Problem 12 (→Solution: Fixed inconsistency in definition of variables for balls and urns (i.e. "p,q,r,s" "a,b,c,d"))