Open Directory - Science: Math: Recreations
See also: This category in other languages: - Curves you've heard of and curves you haven't, from Astroid to the Witch of Agnesi. - 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. - An applet for making spirograph graphs. Includes options for size, color and shape. Allows saving of completed image. - Includes description, solutions and other resources on this cube-like puzzle. - 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. - Include news, math tricks, methods, facts, trivia, mostly posted by users. - Teaching and recreational items in this personal collection. - Book list from Eric Weisstein including titles, authors, publishers, prices, page count and some have links to Amazon.com. - Includes a complete list of all possible Fair Dice, most of which are not cubes. Includes pictures. - Visual animations of famous curves. - Three categories: defensive - know to check an answer, offensive - fast mental calculations, and math magic. - The relation between Fibonacci numbers and Pascal's triangle. English/German/Serbian. - Numerous facts including formulas, magic tricks, fallacies and recreations compiled by Dr. Gerard P. Michon. - Rough index to the fifteen books containing Martin Gardner's Mathematical Games articles from Scientific American. - By Joseph Malkevitch: "Given one shape X how and when can one pack identical copies of this shape into another shape Y?" - A collection of problems from MIT. Work reported herein was conducted at the Artificial Intelligence Laboratory, a Massachusetts Institute of Technology research program. - Provides a method of finding a square root without the use of a calculator. - A page on polyiamond puzzles. Includes many pages on tessellation. - Creates a special kind of summation formula created by John Conway. - Book list split into categories. Includes title, author, publisher and date information about each book. - A newsletter edited by undergraduates of the Department of Mathematics at the University of Toronto. Includes some online copies. - A contest that asks to write all integers from 1 to 100 using only the digits 2,0,0,1 and arithmetic operations. - 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. - View this week's algebra problem or those of previous weeks. - Interactive java puzzles and activities in different mathematical topics. - A guide to major motion pictures with scenes of real mathematics. - A page of uncommon problems, most closely connected with number theory. - Designed and built by Andrew Lipson. Images and LDraw files. - Mathematics Hots (Problems) by Bruno Kevius - At Mathematics Museum (Japan) you would be surprised how interesting mathematics is. You will find exhibition rooms produced by Japanese researchers and educators. - An interdisciplinary course on mathematics in art and architecture. - Individual pages on different topics in Mathematics. Examples : group theory, dynamical systems theory, geometry or number theory. - 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. - Have fun with geometric shapes, fractals, math games, art, humor, quotes, and important constants. - Includes puzzles, jokes, quotations, poetry, and FAQs. - A short description of mazes and how to create them. Definition of different mazetypes and their algorithms. - 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. - Features interesting facts about different numbers. Includes favorite related links. - This is an article on a set of didactical games edited by the Portuguese Mathematical Society (SPM). [PDF] - Explains Conway's audioactive decay that is generated by a particular kind of sequence. Includes illustrations and related resources. - Dr Colin Rose provides some examples of numbers that are representable by mathematically manipulating the digits of the numbers themselves. - Includes pages on magic squares and polyomino patterns and contains related java applets. - An extensive list of web resources for recreational math. - A forum for posting messages about math recreations. Hosted at Delphi. - By Steven Dutch. Symmetry, Crystals, Polyhedra and Tilings; Pythagorean triplets and other things about sums of powers; Geometry Classics. - 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. - Notes on the mathematics of the Rubik's cube. - 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. - An article about him and his interests and contributions to recreational mathematics. - A colourful world built entirely using mathematical atoms and molecules. Pictures and animations demonstrate structures colliding and interacting. Animated GIF demonstrations. - A windows application that creates mathematically precise spirograph drawings; savable as images. - A collection of card tricks, number guessing games, paper and glue magic, and other math exercises. - 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). - A brief digression into how people perceive symmetrical patterns -- what makes them boring, interesting, or overly intricate - 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 special collection at the University of Calgary, including the archives of Martin Gardner. There is a searchable online index. - Puzzles and problems connected with numbers using the digits 1-9. - Algorithmic music determined by mathematics and by the musical preferences of a human. General MIDI files. - Profile and description of his mathematical games and puzzles. - High school research project. - An essay by Scott Aaronson on the quest for ever-bigger numbers, from exponentials to Busy Beavers.
