User contributions
- 11:26, 21 January 2016 (diff | hist) . . (+26) . . m 2009 AMC 12B Problems/Problem 21 (→Solution 1: Fixed overcount of case where nobody moves.)
- 11:24, 21 January 2016 (diff | hist) . . (0) . . m 2009 AMC 12B Answer Key (The answer to #21 is A rather than B (see official solutions, here: http://web2.slc.qc.ca/sh/Contest/AMC12_2009B-S.pdf).)
- 09:54, 27 April 2013 (diff | hist) . . (+1,530) . . 1971 Canadian MO Problems/Problem 10 (current)
