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21:59, 13 November 2016 (diff | hist) . . (0)‎ . . 2009 AMC 8 Problems/Problem 20 ‎ (→‎Problem)
21:59, 13 November 2016 (diff | hist) . . (0)‎ . . 2009 AMC 8 Problems/Problem 20 ‎ (→‎Problem)
21:49, 13 November 2016 (diff | hist) . . (-214)‎ . . 2009 AMC 8 Problems/Problem 21 ‎ (→‎Solution)

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