Slide game requiring users to swap the order of the tiles to solve the puzzle. Includes a hall of fame, redo, and undo features.

Find shareware downloads for over 500 million math puzzles in the form of a multimedia game. Contains related links.

Numerical crossword puzzle which creates a number of different challenges for players. Solution details provided.

Find over 160 of these mathematical brain teasers, plus a primer and related links and books.

Try your hand at math puzzles at "mathematical recreations" at Ed Pegg's site. Extensive list of links to puzzle sites.

Problem requires user to have a knowledge of basic math. Calculator and/or scratch paper is recommended.

Find rules and instructions on how to play this Japanese game. Hints and solution provided for those who find the puzzle too complicated.

Choose a difficulty level between one and ten, and then place the numbers one to nine across in each row. No repeated numbers allowed.

Find 14 brain thumpers for the mathematically inclined. Contains answers on separate page.