User contributions
- 10:23, 19 October 2013 (diff | hist) . . (+409) . . Pigeonhole Principle/Solutions (Added possible solution for O6)
- 10:05, 19 October 2013 (diff | hist) . . (+2) . . m Pigeonhole Principle/Solutions (Corrected possible typo. Changed value from 4 to n-1 in M1, Line 4)