PUZZLES MATHEMATICAL

Jim Loy's Puzzle Page
Classic and original puzzles.
www.jimloy.com

The Puzzles of Oscar
Contains puzzles and games with solutions.
uk.geocities.com

Mathematical Jigsaw Puzzles
Information on polyominos and square puzzles.
home.hetnet.nl

Leisure Ideas: Puzzles
Some mathematical puzzles with answers and/or a hint.
www.leisureideas.com

Kakuro-san
Providing graded Kakuro puzzles every day, plus old puzzles.
www.kakurosan.com

CellFighter
Shareware game based around an extension of the game of life.
www.cellfighter.com

The Monty Hall Problem
A probability theory puzzle with solutions. [English and German.]
www.remote.org

IBM Research: Ponder This
Monthly logic and math puzzles set by IBM researchers with solutions.
domino.research.ibm.com

The Truth Tree's Math and Logic Board
Collection of math and logic puzzles ranging in levels of difficulty.
www.truthtree.com

TechInterview
Answers to technical interview questions, programming problems, and brain teasers.
www.techinterview.org

Quick Logic Puzzles
Use the clues provided to deduce the correct sequence of numbers in the hidden code.
www.robertwilliams.org

Two Envelope Paradox - Solution
Claims that the two envelope paradox comes from the incorrect use of probabilities.
www.anc.ed.ac.uk

WU Forums
Discussion board hosted at Berkeley with talk about a variety of solved and unsolved brain teasers.
www.ocf.berkeley.edu

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.]
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.
perplexus.info