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 Competitions (122)
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 DIRECTORY/Science/Tech/Math/Recreations (657)
i0A Mathematician's Aesthetics - http://finitegeometry.org/sc/ph/aesthetics.html - 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.
 
i0A Disproof of Pythagoras' Theorem? - http://www.geocities.com/ResearchTriangle/System/8956/problems/pyth.htm - 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.
 
i0Amazing Spiro - http://cgibin.erols.com/ziring/cgi-bin/spiro.pl/spiro.html - An applet for making spirograph graphs. Includes options for size, color and shape. Allows saving of completed image.
 
i0Back to Square One - http://www.geocities.com/jaapsch/puzzles/square1.htm - Includes description, solutions and other resources on this cube-like puzzle.
 
i0Critical Math - http://www.gwywyr.com/articles/scimaths/ - Articles and images on recreational math from fractals and magic squares to mathemorchids and Galois.
 
i0Cryptarithms Online - http://www.geocities.com/Athens/Agora/2160/ - 70 brain-teasers; a Primer on Cryptarithmetic; books and links to alphametics on the Web.
 
i0CuriousMath - http://www.curiousmath.com/ - Include news, math tricks, methods, facts, trivia, mostly posted by users.
 
i0David Singmaster: List of Available Material - http://anduin.eldar.org/~problemi/singmast/material.html - Teaching and recreational items in this personal collection.
 
i0Eric's Scientific Book List: Recreational Mathematics - http://www.ericweisstein.com/encyclopedias/books/RecreationalMathematics.html - Book list from Eric Weisstein including titles, authors, publishers, prices, page count and some have links to Amazon.com.
 
i0Eureka - http://www.archim.org.uk/eureka/ - The annual journal of the Archimedeans, the mathematical society of the University of Cambridge. It regularly contains articles on recreational mathematics.
 
i0Fair Dice - http://www.mathpuzzle.com/Fairdice.htm - Includes a complete list of all possible Fair Dice, most of which are not cubes. Includes pictures.
 
i0Famous Curves - http://www.geocities.com/famouscurves/ - Visual animations of famous curves.
 
i0Famous Curves Index - http://www-groups.dcs.st-and.ac.uk/~history/Curves/Curves.html - Curves you've heard of and curves you haven't, from Astroid to the Witch of Agnesi.
 
i0Fast Arithmetic Tips - http://www.cut-the-knot.org/arithmetic/rapid/ - Three categories: defensive - know to check an answer, offensive - fast mental calculations, and math magic.
 
i0Fibonacci numbers and the Pascal triangle - http://milan.milanovic.org/math/ - The relation between Fibonacci numbers and Pascal's triangle. English/German/Serbian.
 
i0Final Answers - http://home.att.net/~numericana/answer/ - Numerous facts including formulas, magic tricks, fallacies, recreations compiled by Dr. Gerald P. Michon.
 
i0Fun With Mathematics - http://www.geocities.com/hjsmithh/ - Includes pages on the topics of primes, fibonacci numbers, PI computation, data encryption and links to calculator programs.
 
i0Gardner Index - http://www.ms.uky.edu/~lee/ma502/gardner5/gardner5.html - Rough index to the fifteen books containing Martin Gardner's Mathematical Games articles from Scientific American.
 
i0Geometric Packing Problems - http://www.york.cuny.edu/~malk/tidbits/tidbit-geometric-packing.html - By Joseph Malkevitch: "Given one shape X how and when can one pack identical copies of this shape into another shape Y?"
 
i0HAKMEM - http://www.inwap.com/pdp10/hbaker/hakmem/hakmem.html - A collection of problems from MIT. Work reported herein was conducted at the Artificial Intelligence Laboratory, a Massachusetts Institute of Technology research program.
 
i0How To Manually Find A Square Root - http://math.arizona.edu/~kerl/doc/square-root.html - The way to do find a square root without a calculator.
 
i0Iamond - http://www.mathpuzzle.com/iamond.htm - A page on polyiamond puzzles. Includes many pages on tessellation.
 
i0Jlpe's Number Recreations Page - http://www.geocities.com/windmill96/numrecreations.html - Features original number recreations by the author, such as generalized perfect numbers, digital diversions, diophantine equations, didactic numbers, and number theory.
 
i0Look and Say Sequence Generator - http://www.btinternet.com/~se16/js/looknsay.htm - Creates a special kind of summation formula created by John Conway.
 
i0MAA Library List in Recreational Mathematics - http://www.maa.org/BLL/recmath.htm - Book list split into categories. Includes title, author, publisher and date information about each book.
 
i0MAT 007 I News - http://www.math.toronto.edu/007/ - A newsletter edited by undergraduates of the Department of Mathematics at the University of Toronto. Includes some online copies.
 
i0Math Forum: 2001 Mathematics Game - http://mathforum.org/~judyann/2001/ - A contest that asks to write all integers from 1 to 100 using only the digits 2,0,0,1 and arithmetic operations.
 
i0Math Forum: 2002 Mathematics Game - http://mathforum.org/~judyann/2002/ - 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.
 
i0Math Forum: Algebra Problem of the Week - http://mathforum.org/algpow/ - View this week's algebra problem or those of previous weeks.
 
i0Math Magic By Computer - http://www.cut-the-knot.org/Curriculum/index.shtml#magic - Interactive java puzzles and activities in different mathematical topics.
 
i0Math in the Movies - http://world.std.com/~reinhold/mathmovies.html - A guide to major motion pictures with scenes of real mathematics.
 
i0Mathematical Fiction - http://math.cofc.edu/faculty/kasman/MATHFICT/ - 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.
 
i0Mathematical Induction - http://www.math.cl/induction.html - A page of uncommon problems, most closely connected with number theory.
 
i0Mathematical Lego Sculptures - http://www.andrewlipson.com/mathlego.htm - Designed and built by Andrew Lipson. Images and LDraw files.
 
i0Mathematical Problems - Problem Solving - http://mathres.kevius.com/problem.html - Mathematics Hots (Problems) by Bruno Kevius
 
i0Mathematical Quotation Server - http://math.furman.edu/~mwoodard/mquot.html - A collection of mathematical quotations culled from many sources. You may conduct a keyword search through the quotation database.
 
i0Mathematical Quotation Server - http://math.furman.edu/~mwoodard/mqs/mquot.shtml - Furman University Mathematical Quotation Server - random or searchable math quotes.
 
i0Mathematical Spectrum - http://www.apt.group.shef.ac.uk/ms.html - 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.
 
i0Mathematics Museum (Japan) - http://mathmuse.sci.ibaraki.ac.jp/indexE.html - At Mathematics Museum (Japan) you would be surprised how interesting mathematics is. You will find exhibition rooms produced by Japanese researchers and educators.
 
i0Mathematics in Art and Architecture - http://www.math.nus.edu.sg/aslaksen/teaching/math-art-arch.shtml - An interdisciplinary course on mathematics in art and architecture.
 
i0Mathematik - http://www.mathematik.com/ - Individual pages on different topics in Mathematics. Examples : group theory, dynamical systems theory, geometry or number theory.
 
i0Mathematische Basteleien - http://www.mathematische-basteleien.de/ - 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.
 
i0Mathmos - http://www.mathmos.net/ - Includes puzzles, jokes, quotations, poetry, and FAQs.
 
i0Maze Classification and Algorithms - http://www.astrolog.org/labyrnth/algrithm.htm - A short description of mazes and how to create them. Definition of different mazetypes and their algorithms.
 
i0Mudd Math Fun Facts - http://www.math.hmc.edu/funfacts/ - 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.
 
i0Narcissistic Numbers - http://www.geocities.com/~harveyh/narciss.htm - Those that are representable, in some way, by mathematically manipulating the digits of the numbers themselves.
 
i0Number Recreations by Shyam Sunder Gupta - http://www.shyamsundergupta.com/ - Features interesting facts about different numbers. Includes favorite related links.
 
i0On the Puzzles with Polyhedra and Numbers - http://gfm.cii.fc.ul.pt/people/jrezende/jr_poliedros-puzzles_en.pdf - This is an article on a set of didactical games edited by the Portuguese Mathematical Society (SPM).
 
i0One Metaphor Fits All - http://www.btinternet.com/~se16/mhi/ - Explains Conway's audioactive decay that is generated by a particular kind of sequence. Includes illustrations and related resources.
 
i0Origami Mathematics - http://www.merrimack.edu/~thull/OrigamiMath.html - Information on the mathematics of paper folding.
 
i0Properties of Dice - http://hjem.get2net.dk/Klaudius/Dice.htm - Polyhedral dice and their properties.
 
i0Recmath - http://www3.sympatico.ca/diharper/ - Includes pages on magic squares and polyomino patterns and contains related java applets.
 
i0Recreational Mathematics - http://camel.math.ca/Recreation/recreation.html - Links collected at CAMEL, the Canadian Mathematical Society website.
 
i0Recreational Mathematics (David Eppstein) - http://www.ics.uci.edu/~eppstein/recmath.html - An extensive list of web resources for recreational math.
 
i0Recreational Mathematics Forum - http://forums.delphiforums.com/recmath/ - A forum for posting messages about math recreations. Hosted at Delphi.
 
i0Recreational Mathematics Topics - http://www.uwgb.edu/dutchs/RECMATH/recmath.htm - By Steven Dutch. Symmetry, Crystals, Polyhedra and Tilings; Pythagorean triplets and other things about sums of powers; Geometry Classics.
 
i0Roman Numerals - http://www.novaroma.org/via_romana/numbers.html - 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.
 
i0Rubik's Cube Lecture Notes - http://web.usna.navy.mil/~wdj/rubik_nts.htm - Notes on the mathematics of the Rubik's cube.
 
i0SimonSingh.net - http://www.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.
 
i0Sir Roger Penrose - http://www.worldofescher.com/misc/penrose.html - An article about him and his interests and contributions to recreational mathematics.
 
i0Skytopia - Super Magnet - http://www.skytopia.com/project/magnet/magnet.html - A colourful world built entirely using mathematical atoms and molecules. Pictures and animations demonstrate structures colliding and interacting. Animated GIF demonstrations.
 
i0Spirocharts - http://www.nehuenmultimedia.com.ar/html/spirograph.html - A windows application that creates mathematically precise spirograph drawings; savable as images.
 
i0Sportlab - http://www.geocities.com/sportlab/ - Combines high school and college math topics into sports applications.
 
i0Stunning Friends with Math Magic - http://www.cut-the-knot.org/arithmetic/rapid/magic.shtml - A collection of card tricks, number guessing games, paper and glue magic, and other math exercises.
 
i0Table of Numbers Problem - http://www.alpertron.com.ar/CUADRO.HTM - 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).
 
i0The Aesthetics of Symmetry - http://home.earthlink.net/~jdc24/symmetry.htm - A brief digression into how people perceive symmetrical patterns -- what makes them boring, interesting, or overly intricate
 
i0The Diamond 16 Puzzle - http://finitegeometry.org/sc/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).
 
i0The Eugène Strens Recreational Mathematics Collection - http://www.ucalgary.ca/lib-old/SpecColl/strens.htm - A special collection at the University of Calgary, including the archives of Martin Gardner. There is a searchable online index.
 
i0The Nine Digits Page - http://www.worldofnumbers.com/ninedig1.htm - Puzzles and problems connected with numbers using the digits 1-9.
 
i0The Sound of Mathematics - http://www.geocities.com/Vienna/9349/ - Algorithmic music determined by mathematics and by the musical preferences of a human. General MIDI files.
 
i0Wade Edward Philpott - http://www.gamepuzzles.com/wade.htm - Profile and description of his mathematical games and puzzles.
 
i0Who Can Name the Bigger Number? - http://www.scottaaronson.com/writings/bignumbers.html - An essay by Scott Aaronson on the quest for ever-bigger numbers, from exponentials to Busy Beavers.
 
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