Games

Monthly logic and math puzzles set by IBM researchers with solutions.

JavaScript example of the Monty Hall Game. This game demonstrates the real (empirical) affect of statistics. [Does not display correctly in all browsers.]

A probability theory puzzle with solutions. [English and German.]

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.

Claims that the two envelope paradox comes from the incorrect use of probabilities.

Discussion board hosted at Berkeley with talk about a variety of solved and unsolved brain teasers.