User contributions
- 12:46, 2 July 2013 (diff | hist) . . (+12) . . 2013 AMC 10A Problems (→Problem 19)
- 12:40, 28 June 2013 (diff | hist) . . (+11) . . m 2013 AMC 10A Problems/Problem 19 (→change from "For how many digits b..." to "For how many positive integers b..." to avoid confusion)
