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Internet Directory - Top : Games : Puzzles : Brain Teasers : Mathematical

Top : Games : Puzzles : Brain Teasers : Mathematical (11 web sites)
Sudoku
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Science: Math: Recreations: Games_and_Puzzles
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CellFighter
Shareware game based around an extension of the game of life.
http://www.cellfighter.com/conways-life-download.html

IBM Research: Ponder This
Monthly logic and math puzzles set by IBM researchers with solutions.
https://www.research.ibm.com/haifa/ponderthis/

Mathematical Puzzles
Number puzzles with various levels of difficulty and solutions. Includes printable versions.
http://www.mathematical-puzzles.com/

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/

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/

Quick Logic Puzzles
Use the clues provided to deduce the correct sequence of numbers in the hidden code.
http://www.robertwilliams.org/qlp/index.html

The Monty Hall Problem
A probability theory puzzle with solutions. [English and German.]
http://www.remote.org/frederik/projects/ziege/

Two Envelope Paradox - Solution
Claims that the two envelope paradox comes from the incorrect use of probabilities.
http://homepages.inf.ed.ac.uk/amos/doubleswapsoln.html

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