User contributions
- 00:35, 17 May 2009 (diff | hist) . . (+1) . . 2000 AMC 12 Problems/Problem 20
- 00:32, 17 May 2009 (diff | hist) . . (+5) . . 2000 AMC 12 Problems/Problem 20
- 00:22, 17 May 2009 (diff | hist) . . (-24) . . 2000 AMC 12 Problems/Problem 20 (→Solution 1)
- 00:13, 17 May 2009 (diff | hist) . . (-2) . . 2000 AMC 12 Problems/Problem 20