User contributions
- 23:27, 19 December 2017 (diff | hist) . . (+18) . . 2010 AMC 12A Problems/Problem 21 (→Solution 2)
- 23:26, 19 December 2017 (diff | hist) . . (-13) . . 2010 AMC 12A Problems/Problem 21 (→Solution 2)
- 23:24, 19 December 2017 (diff | hist) . . (-4) . . 2010 AMC 12A Problems/Problem 21 (→Solution 2)
- 23:23, 19 December 2017 (diff | hist) . . (+282) . . 2010 AMC 12A Problems/Problem 21 (→Solution 2)
