The really short answer? Its about learning and exploring mathematics via math related games, riddles, and puzzles….but the activities could have you going for hours, days, weeks, or longer!
Wikipedia: Recreational Mathematics – Explains what recreational mathematics is.
Scientific American: A Quarter-Century of Recreational Mathematics – PDF Article written by Martin Gardener about 25 years of amusing puzzles and serious discoveries.
Article by Charles W. Trigg: What is Recreational Mathematics? This a PDF file. This article was written in Mathematics Magazine Vol. 51, No. 1 (Jan., 1978), pp. 18 -21
MathOverflow: Recreational mathematics: where to search? – MathOverflow is a Q & A site for professional mathematicians. This question came up and offers a few responses.
For the rest of this series please visit my Recreational Mathematics post.
Here’s a video about recreational mathematics…