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• Arts: Crafts: Paper: Origami: Geometry and Modulars  (11)
• Games: Puzzles  (656)
• Recreation: Humor: Science: Mathematics  (24)
• Science: Math: Chaos and Fractals: Fractal Art  (129)
• Science: Math: Geometry: Sculpture and Art  (15)

This category in other languages:
	Chinese Simplified  (4)   French  (38)   Russian  (13)   Spanish  (39)

• 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.
• 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.
• David Singmaster: List of Available Material - Teaching and recreational items in this personal collection.
• 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).
• 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.
• Eric's Scientific Book List: Recreational Mathematics - Book list from Eric Weisstein including titles, authors, publishers, prices, page count and some have links to Amazon.com.
• The Eugène Strens Recreational Mathematics Collection - A special collection at the University of Calgary, including the archives of Martin Gardner. There is a searchable online index.
• 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.
• Fibonacci Numbers and the Pascal Triangle - The relation between Fibonacci numbers and Pascal's triangle. English/German/Serbian.
• 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.
• How to Manually Find a Square Root - Provides a method of finding a square root without the use of a calculator.
• 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.
• Look and Say Sequence Generator - Creates a special kind of summation formula created by John Conway.
• MAA Library List in Recreational Mathematics - Book list split into categories. Includes title, author, publisher and date information about each book.
• 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 Forum: Algebra Problem of the Week - View this week's algebra problem or those of previous weeks.
• 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 Lego Sculptures - Designed and built by Andrew Lipson. Images and LDraw files.
• Mathematical Problems - Problem Solving - Mathematics Hots (Problems) by Bruno Kevius
• 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 in Art and Architecture - An interdisciplinary course on mathematics in art and architecture.
• 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.
• Narcissistic Numbers - Those that are representable, in some way, by mathematically manipulating the digits of the numbers themselves.
• The Nine Digits Page - Puzzles and problems connected with numbers using the digits 1-9.
• Number Recreations by Shyam Sunder Gupta - Features interesting facts about different numbers. Includes favorite related links.
• On the Puzzles with Polyhedra and Numbers - This is an article on a set of didactical games edited by the Portuguese Mathematical Society (SPM). [PDF]
• One Metaphor Fits All - Explains Conway's audioactive decay that is generated by a particular kind of sequence. Includes illustrations and related resources.
• Origami Mathematics - Information on the mathematics of paper folding.
• Recmath - Includes pages on magic squares and polyomino patterns and contains related java applets.
• Recreational Mathematics - Links collected at CAMEL, the Canadian Mathematical Society website.
• Recreational Mathematics (David Eppstein) - An extensive list of web resources for recreational math.
• Recreational Mathematics Forum - A forum for posting messages about math recreations. Hosted at Delphi.
• 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.
• Rubik's Cube Lecture Notes - Notes on the mathematics of the Rubik's cube.
• 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.
• The Sound of Mathematics - Algorithmic music determined by mathematics and by the musical preferences of a human. General MIDI files.
• Spirocharts - A windows application that creates mathematically precise spirograph drawings; savable as images.
• Sportlab - Combines high school and college math topics into sports applications.
• 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.
• Who Can Name the Bigger Number? - An essay by Scott Aaronson on the quest for ever-bigger numbers, from exponentials to Busy Beavers.

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