User contributions
- 21:53, 8 February 2016 (diff | hist) . . (+28) . . m 2016 AMC 10A Problems/Problem 23 (Replaced commas w/ arrows)
- 16:18, 7 February 2016 (diff | hist) . . (+945) . . 2016 AMC 10A Problems/Problem 23 (Added third solution; does not involve finding the identity of the operator.)
- 20:34, 14 August 2014 (diff | hist) . . (+10) . . m Nonnegative number
- 20:34, 14 August 2014 (diff | hist) . . (+25) . . m Positive number (added to "see also")
