User contributions
- 09:32, 25 September 2019 (diff | hist) . . (+29) . . m Knowledge bowl competitions (→United States)
- 21:10, 19 January 2019 (diff | hist) . . (+57) . . MATHCOUNTS (→National Competition Sites: I added the 2019 location.)
- 21:34, 26 October 2018 (diff | hist) . . (+81) . . N Pentagonal number (Created page with "A pentagonal number is a number that can be expressed in the shape of a pentagon.") (current)