| A Mathematician's Aesthetics | | In his classic A Mathematician's Apology, G. H. Hardy likened mathematics to poetry and painting. This site elaborates on Hardy's remark with quotations from Stevens, Klee, Fry, and Focillon. Links to related sites are given. |
| A Disproof of Pythagoras' Theorem? | | A method of disproving the Theorem of Pythagoras is presented. The author is adamant that this is intended only as a puzzle to find the mistake in the arguments, and not as a serious proposal. |
| Back to Square One | | Includes description, solutions and other resources on this cube-like puzzle. |
| Critical Math | | Articles and images on recreational math from fractals and magic squares to mathemorchids and Galois. |
| Cryptarithms Online | | 70 brain-teasers; a Primer on Cryptarithmetic; books and links to alphametics on the Web. |
| CuriousMath | | Include news, math tricks, methods, facts, trivia, mostly posted by users. |
| Eureka | | The annual journal of the Archimedeans, the mathematical society of the University of Cambridge. It regularly contains articles on recreational mathematics. |
| Fair Dice | | Contains a complete list of all possible Fair Dice, most of which are not cubes. Includes pictures. |
| Famous Curves Index | | Curves you've heard of and curves you haven't, from Astroid to the Witch of Agnesi. |
| Fast Arithmetic Tips | | Three categories: defensive - know to check an answer, offensive - fast mental calculations, and math magic. |
| Final Answers | | Numerous facts including formulas, magic tricks, fallacies, recreations compiled by Dr. Gerald P. Michon. |
| Fun With Mathematics | | Includes pages on the topics of primes, fibonacci numbers, PI computation, data encryption and links to calculator programs. |
| Gardner Index | | Rough index to the fifteen books containing Martin Gardner's Mathematical Games articles from Scientific American. |
| Geometric Packing Problems | | By Joseph Malkevitch: "Given one shape X how and when can one pack identical copies of this shape into another shape Y?" |
| HAKMEM | | A collection of problems from MIT. Work reported herein was conducted at the Artificial Intelligence Laboratory, a Massachusetts Institute of Technology research program. |
| Iamond | | A page on polyiamond puzzles. Includes many pages on tessellation. |
| Jlpe's Number Recreations Page | | Features original number recreations by the author, such as generalized perfect numbers, digital diversions, diophantine equations, didactic numbers, and number theory. |
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