Mathematical Puzzles
- Interactive Mathematics Miscellany and Puzzles
- Excellent.
- Ken Duisenberg's Puzzle of the Week
- A good archive to dip into.
- MathPuzzle.com
- The webmaster, Ed Pegg Jr, is a twenty year member of the National Puzzler's League, and frequently contributes to the New York Times crossword, Games, and National Public Radio's Sunday Puzzler. This fantastic site is packed full of interesting goodies, and there's a weekly math puzzle.
- The MathSoft Math Puzzle Page
- Mathematical puzzles featured here have been previously published in Allan Gottlieb's column in the Tech Review.
- Nick's Mathematical Puzzles
- The puzzles presented here are selected for the deceptive simplicity of their statement, or the elegance of their solution. They range over geometry, probability, number theory, algebra, calculus, trigonometry, and logic. All require a certain ingenuity, but usually only pre-college math. Some puzzles are original.
- The Null Set - Mathematical Puzzles
- A good selection of puzzles, by Guy Kindler at Tel Aviv University, graded from simple to tough - but most requiring some undergraduate maths knowledge.
- Number and Word Puzzles
- 44 monthly puzzles provide entertainment and education for all ages on this Australian website.
- The Puzzlet Page
- Enjoy mental workouts? Use maths occasionally? Like numerical brainteasers? Revel in intellectual challenges? Dabble in computer programming? Answer "yes" to any of these questions, and this is the right place for you!
- The Puzzling World of Barry R. Clarke
- Brain Teasers, Puzzles Forum, Articles, Brain Tests, Links. Stimulate your brain with original brain teasers
