The most comprehensive and easy to navigate link directory for anything related to other puzzles and brain activities - games, toys, crosswords, quizzes, trivia, IQ, math and much more.
A large collection of logic puzzles, math puzzles, puzzling riddles and other brain teasers
Algebra, geometry, matchstick and logic puzzles, paradoxes, optical illusions, IQ tests and logic games.
Math puzzles and problems collected by Ken Duisenberg.
Mathematicians seek knowledge. In search of knowledge, they enjoy themselves tremendously inventing and solving new problems. Interactive Mathematics Miscellany and Puzzles makes an attempt to present mathematics as an evolving and entertaining subject in which an unsuspecting visitor may take an active part.
Full professor of 'Analisi Numerica', Dept. of Mathematics and Physics, Univ. Cattolica del Sacro Cuore di Brescia.
A great collection of Fair Dice, Iamonds, Eternity, Mazes, Atom Stability, Dissections, Kites&Bricks, Triangles, Retrograde, Pentagons, Prize Problems, Books, Links, Chaos Tiles, and Partridges by Ed Pegg Jr.