- 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.
- A Primer on Cryptarithmetic - Instructions, examples, references and links.
- Alien Tiles - Object of puzzle is to try to get color pieces to create certain patterns in cube.
- Alphametic Puzzles - Nmerous puzzles, links, puzzle solver, and a generator.
- Alphametics and Cryptarithms - Cryptarithms are puzzles in which letters or symbols are substituted for the digits in an arithmetical calculation. If a cryptarithm utilizes letters in place of the digits, and these letters form sensible words or phrases, the puzzle is termed an alphametic.
- Alphametics Page - Compiled by Mike Keith. Examples of various genres.
- Back to Square One - Includes description, solutions and other resources on this cube-like puzzle.
- Bob's Positive Integer Pages - Various articles about positive integers, including an alternative number system that avoids the digit and number zero, a look at number systems and at the concept of zero.
- Clever Games for Clever People - Games that interest John Conway including Rim and Traffic Jam.
- Contest Center Cryptarithms - Examples of cryptarithms, with prize competitions for subscribers.
- Conway's Constant - The problem is to try to arrive at the number of digits in the Kth term of a type of sequence.
- 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.
- David Singmaster: List of Available Material - Teaching and recreational items in this personal collection.
- Decimal to Hexadecimal Conversion - A table to convert any number from 1 to 255 to Hexadecimal.
- EFF Cooperative Computing Awards - Between $100,000 and $250,000 will go to the first individual or group who discovers a new prime number above 10 million digits.
- 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.
- Fibonacci Numbers and the Golden section in Nature - Puzzles and things to do, for schools, teachers, colleges up to university level students, or just for recreation.
- Fibonacci numbers and the Pascal triangle - The relation between Fibonacci numbers and Pascal's triangle. English/German/Serbian.
- 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.
- Gathering for Gardner - Contains math, puzzle, geometry, illusions, mazes, links, articles and problems.
- 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?"
- Group Games - Animations that develop the theory behind such puzzles as the Rubik cube.
- 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.
- Ken Duisenberg's Puzzle of the Week - Has a new problem to solve on a regular basis. Includes archive and some solutions.
- Ken Duisenberg's Puzzle of the Week Archives - Challenging puzzles and problems.
- Logic Puzzles - Collection of original numerical-logic puzzles. Many are long and difficult, involve sorting and comparing long lists and are intended to be solved using a good spreadsheet program.
- 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 Cats - A magic chalkboard takes you to a math art gallery and lots of interactive math activities, including: magic squares, conversions, seasonal surveys, symmetry, tessellations, geometric designs, games.
- Math Forum: Algebra Problem Search - Try to solve the Algebra Problem of the Week and search 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.
- Mathematical Diversions - Mostly original diversions in mathematics and word play.
- 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 Poetry - A Small Anthology - A fascinating selection of poems by various poets based on the seemingly incongruous aesthetic and theme of mathematics.
- Mathematical Problems - Problem Solving - Mathematics Hots (Problems) by Bruno Kevius
- Mathematical Quotation Server - Furman University Mathematical Quotation Server - random or searchable math quotes.
- 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.
- Mathematics for Fun - Interactive math pages including java Kali and a page on the world's largest prime.
- 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.
- 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 - Mathematrix is a web site devoted to exploring mathematical recreations - the more entertaining (and generally lesser known) areas of mathematics. This site can be enjoyed by anyone, from individuals with little or no math background to professors of the subject.
- MathPro Online: Online Reference to Mathematical Problems - database currently contains 20,945 math problems from 38 journals and 21 contests
- Mathpuzzle.com - Celebrates math puzzles and Mathematical Recreations.
- 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.
- 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).
- 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.
- Pocket Calculator - Online calculator, written in Java. Includes Square root button and number memory. Source code can be downloaded.
- Properties of Dice - Polyhedral dice and their properties.
- Puzzle Fun - On-line newsletter edited by Rodolfo Kurchan about polyominoes and other puzzles.
- REC: Recreational and Educational Computing - A newsletter/magazine with programs, including optional supplemental PC disk. All back issues are available. Topics include puzzles & teasers, BASIC programming, math, letters, graphics, fractals, challenges, recreation, reviews, word-play, humor, tips, solutions, and Mathemagical Black Holes.
- 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.
- Rite Item - Geometrical shareware software. Anyangle (Windows/DOS) finds answers to problems involving triangles. Partydot creates patterns.
- Roman Numerals - Contains a introduction to Roman numerals including a translation of the digits used and a convertor which can convert decimal to Roman numerals and vice versa.
- Rubik's Cube Lecture Notes - Notes on the mathematics of the Rubik's cube.
- Scott Kim - Puzzles for web, computers, and print; ambigrams.
- Sequence Puzzles and Problems - With links to related sites. Compiled by Torsten Sillke.
- Sir Roger Penrose - A 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 app that creates mathematically precise spirograph drawings; savable as images.
- Spirograph - A java applet for creating Spirograph images.
- Sportlab - Combines high school and college math topics into sports applications.
- 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).
- The Aesthetics of Symmetry - A brief digression into how we perceive symmetrical patterns -- what makes them boring, interesting, or overly intricate
- The Chaos Hypertextbook - The theory behind the sumptuous images and technical jargon of chaos, fractals, and nonlinear dynamics. Simple experiments for programmable calculators, instructions for drawing fractal images, and the meanings of dimension.
- 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).
- 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.
- The Nine Digits Page - Puzzles and problems connected with numbers using the digits 1-9.
- The rec.puzzles Archive - This newsgroup archive is a list of puzzles, categorized by subject area. Each puzzle includes a solution, compiled from various sources, which is supposed to be definitive.
- The Snarking of the Hunt - Visitors are invited to analyse the verses to discover mathematical puzzles and riddles. They are invited to offer solutions.
- The Sound of Mathematics - Algorithmic music determined by mathematics and by the musical preferences of a human. General MIDI files.
- Treasure Troves : Book List - Book list including titles, authors, publishers, prices, page count and some have links to Amazon.com.
- U of T Mathematics Network - Includes interactive games, problems and puzzles including the Monty Hall Problem and the Tower of Hanoi and questions pages with answers and discussion.
- Wade Edward Philpott - Profile and description of his mathematical games and puzzles.
- Wade Edward Philpott Collection - A special collection at the University of Calgary Library.
- Who Can Name the Bigger Number? - An essay by Scott Aaronson on the quest for ever-bigger numbers, from exponentials to Busy Beavers.
- World of Numbers - Contains a collection of randomly gathered numbers, curios, puzzles, palindromes and primes.
- Search our Wiki for Math Recreations - Find more information about this subject by clicking here
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