» Famous Curves Index - Curves you've heard of and curves you haven't, from Astroid to the Witch of Agnesi.
» The Aesthetics of Symmetry - A brief digression into how people perceive symmetrical patterns -- what makes them boring, interesting, or overly intricate
» Amazing Spiro - An applet for making spirograph graphs. Includes options for size, color and shape. Allows saving of completed image.
» Back to Square One - Includes description, solutions and other resources on this cube-like puzzle.
» Cryptarithms Online - A large collection of cryptarithms and alphametics, including cryptarithms from the journal Sphinx, a Primer on Cryptarithmetic, books, and links to other collections of alphametics on the Web.
» CuriousMath - Include news, math tricks, methods, facts, trivia, mostly posted by users.
» The Diamond 16 Puzzle - New version of the classic puzzle using row/column/quadrant permutations to display symmetries of graphic designs. Has link to a site on the underlying mathematics (Diamond Theory).
» Eureka - The annual journal of the Archimedeans, the mathematical society of the University of Cambridge. It regularly contains articles on recreational mathematics.
» Fair Dice - Includes a complete list of all possible Fair Dice, most of which are not cubes. Includes pictures.
» Famous Curves - Visual animations of famous curves.
» 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.
» 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.
» MAT 007 I News - A newsletter edited by undergraduates of the Department of Mathematics at the University of Toronto. Includes some online copies.
» Math Forum: 2001 Mathematics Game - A contest that asks to write all integers from 1 to 100 using only the digits 2,0,0,1 and arithmetic operations.
» Math Forum: 2002 Mathematics Game - A contest where the contestants have to write all integers from 1 to 100 using only the digits 2,0,0,2 and arithmetic operations.
» Math in the Movies - A guide to major motion pictures with scenes of real mathematics.
» Math Magic By Computer - Interactive java puzzles and activities in different mathematical topics.
» Mathematical Fiction - A list of mathematical fictional movies, books, stories, plays and shows. Split into categories including children's books. Can be sorted by mathematical content and literary quality.
» Mathematical Induction - A page of uncommon problems, most closely connected with number theory.
» Mathematical Quotation Server - A collection of mathematical quotations culled from many sources. You may conduct a keyword search through the quotation database.
» Mathematical Spectrum - Mathematical Spectrum is a magazine for students and teachers of mathematics in universities, colleges and schools worldwide. It may be read by anybody interested in mathematics as a recreation.
» 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.
» Mathematics Museum (Japan) - At Mathematics Museum (Japan) you would be surprised how interesting mathematics is. You will find exhibition rooms produced by Japanese researchers and educators.
» Mathematik - Individual pages on different topics in Mathematics. Examples : group theory, dynamical systems theory, geometry or number theory.
» Mathematische Basteleien - Topics include Flexagon, Soma Cube, Pentominos, Cube-it, Rubik's Cube, Froebel's Star, Tangram, House of Santa Claus, Chronogram, Numeric Palindromes, Latticework of Letters. English/German.
» Mathematrix - Have fun with geometric shapes, fractals, math games, art, humor, quotes, and important constants.
» Mathmos - Includes puzzles, jokes, quotations, poetry, and FAQs.
» Maze Classification and Algorithms - A short description of mazes and how to create them. Definition of different mazetypes and their algorithms.
» Mudd Math Fun Facts - An archive of interesting math facts for use in the classroom or just for fun. Browse by subject, difficulty, keywords, or try the "random" feature. Based at Harvey Mudd College.
» The Nine Digits Page - Puzzles and problems connected with numbers using the digits 1-9.
» One Metaphor Fits All - Explains Conway's audioactive decay that is generated by a particular kind of sequence. Includes illustrations and related resources.
» Recreational Mathematics Topics - By Steven Dutch. Symmetry, Crystals, Polyhedra and Tilings; Pythagorean triplets and other things about sums of powers; Geometry Classics.
» Roman Numerals - Includes a introduction to Roman numerals including a translation of the digits used and a converter which can convert decimal to Roman numerals and vice versa.
» SimonSingh.net - Home of Simon Singh: author, journalist and TV producer, specialising in science and mathematics. Cryptography is one of his specialties, and his site has a lot of educational and fun content about codes and codebreaking.
» Sir Roger Penrose - An article about him and his interests and contributions to recreational mathematics.
» Skytopia - Super Magnet - A colourful world built entirely using mathematical atoms and molecules. Pictures and animations demonstrate structures colliding and interacting. Animated GIF demonstrations.
» Spirocharts - A windows application that creates mathematically precise spirograph drawings; savable as images.
» Stunning Friends with Math Magic - A collection of card tricks, number guessing games, paper and glue magic, and other math exercises.
» Table of Numbers Problem - Given a m * n rectangle, place all numbers from 1 to mn that minimizes the sum of the products of rows and columns (both in Spanish and English).
» Wade Edward Philpott - Profile and description of his mathematical games and puzzles.