User contributions
- 14:04, 28 March 2013 (diff | hist) . . (+2) . . 2013 AMC 10B Problems/Problem 19
- 21:13, 19 March 2013 (diff | hist) . . (+1) . . 2013 AMC 10B Problems/Problem 19
- 21:10, 19 March 2013 (diff | hist) . . (+839) . . 2013 AMC 10B Problems/Problem 19