User contributions
- 15:58, 14 February 2019 (diff | hist) . . (+1) . . 2019 AMC 10B Problems/Problem 21
- 15:43, 14 February 2019 (diff | hist) . . (+512) . . 2019 AMC 10B Problems/Problem 21
- 15:43, 14 February 2019 (diff | hist) . . (+620) . . 2019 AMC 10B Problems/Problem 21
- 08:36, 7 February 2018 (diff | hist) . . (-846) . . 2011 AMC 10A Problems/Problem 21 (→Solution 5)
- 08:26, 7 February 2018 (diff | hist) . . (+846) . . 2011 AMC 10A Problems/Problem 21 (→Solution 4)
