Perplexus A forum and collection of brain teasers, logic problems, math problems, paradoxes, science games, probability, riddles, and geometric shapes. The puzzles are searchable and categorized, most have solutions. http://perplexus.info/ Perplexus.info~Site InfoWhoisTrace RouteRBL Check
WU Forums Discussion board hosted at Berkeley with talk about a variety of solved and unsolved brain teasers. http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_hard Berkeley.edu~Site InfoWhoisTrace RouteRBL Check
Monty Hall Game JavaScript example of the Monty Hall Game. This game demonstrates the real (empirical) affect of statistics. [Does not display correctly in all browsers.] http://montyhallgame.shawnolson.net/ Shawnolson.net~Site InfoWhoisTrace RouteRBL Check