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Famous Problems (24) Flexagons (4) Games and Puzzles (72) Magic Square (43)

Polyominoes (88) Specific Numbers (192) Tessellations (43)

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A 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.

Amazing 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.

Back to Square One - http://www.jaapsch.net/puzzles/square1.htm Includes description, solutions and other resources on this cube-like puzzle.

CuriousMath - http://www.curiousmath.com/ Include news, math tricks, methods, facts, trivia, mostly posted by users.

David Singmaster: List of Available Material - http://anduin.eldar.org/~problemi/singmast/material.html Teaching and recreational items in this personal collection.

Eric'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.

Fair Dice - http://www.mathpuzzle.com/Fairdice.htm Includes a complete list of all possible Fair Dice, most of which are not cubes. Includes pictures.

Famous 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.

Fast 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.

Fibonacci Numbers and the Pascal Triangle - http://milan.milanovic.org/math/ The relation between Fibonacci numbers and Pascal's triangle. English/German/Serbian.

Final Answers - http://home.att.net/~numericana/answer/ Numerous facts including formulas, magic tricks, fallacies, recreations compiled by Dr. Gerald P. Michon.

Gardner 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.

Geometric 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?"

How to Manually Find a Square Root - http://math.arizona.edu/~kerl/doc/square-root.html Provides a method of finding a square root without the use of a calculator.

http://www.archim.org.uk/eureka/ - 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.

http://www.inwap.com/pdp10/hbaker/hakmem/hakmem.html - 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.

http://www.mathmos.net/ - http://www.mathmos.net/ Includes puzzles, jokes, quotations, poetry, and FAQs.

http://www.mathpuzzle.com/iamond.htm - http://www.mathpuzzle.com/iamond.htm A page on polyiamond puzzles. Includes many pages on tessellation.

http://www3.sympatico.ca/diharper/ - http://www3.sympatico.ca/diharper/ Includes pages on magic squares and polyomino patterns and contains related java applets.

Look and Say Sequence Generator - http://www.btinternet.com/~se16/js/looknsay.htm Creates a special kind of summation formula created by John Conway.

MAA 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.

MAT 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.

Math 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.

Math 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.

Math Forum: Algebra Problem of the Week - http://mathforum.org/algpow/ View this week's algebra problem or those of previous weeks.

Math in the Movies - http://world.std.com/~reinhold/mathmovies.html A guide to major motion pictures with scenes of real mathematics.

Math Magic By Computer - http://www.cut-the-knot.org/Curriculum/index.shtml#magic Interactive java puzzles and activities in different mathematical topics.

Mathematical 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.

Mathematical Induction - http://www.math.cl/induction.html A page of uncommon problems, most closely connected with number theory.

Mathematical Lego Sculptures - http://www.andrewlipson.com/mathlego.htm Designed and built by Andrew Lipson. Images and LDraw files.

Mathematical Problems - Problem Solving - http://mathres.kevius.com/problem.html Mathematics Hots (Problems) by Bruno Kevius

Mathematical Quotation Server - http://math.furman.edu/~mwoodard/mqs/mquot.shtml A collection of mathematical quotations culled from many sources. You may conduct a keyword search through the quotation database.

Mathematical 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.

Mathematics 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.

Mathematics 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.

Mathematik - http://www.mathematik.com/ Individual pages on different topics in Mathematics. Examples : group theory, dynamical systems theory, geometry or number theory.

Mathematische 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.

Mathematrix - http://home.adelphi.edu/~stemkoski/mathematrix/ Have fun with geometric shapes, fractals, math games, art, humor, quotes, and important constants.

Maze 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.

Mudd 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.

Number Recreations by Shyam Sunder Gupta - http://www.shyamsundergupta.com/ Features interesting facts about different numbers. Includes favorite related links.

On 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).

One 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.

Origami Mathematics - http://kahuna.merrimack.edu/~thull/OrigamiMath.html Information on the mathematics of paper folding.

Recreational Mathematics - http://camel.math.ca/Recreation/recreation.html Links collected at CAMEL, the Canadian Mathematical Society website.

Recreational Mathematics (David Eppstein) - http://www.ics.uci.edu/~eppstein/recmath.html An extensive list of web resources for recreational math.

Recreational Mathematics Forum - http://forums.delphiforums.com/recmath/ A forum for posting messages about math recreations. Hosted at Delphi.

Recreational 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.

Roman 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.

Rubik's Cube Lecture Notes - http://www.usna.edu/Users/math/wdj/rubik_nts.htm Notes on the mathematics of the Rubik's cube.

SimonSingh.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.

Sir Roger Penrose - http://www.worldofescher.com/misc/penrose.html An article about him and his interests and contributions to recreational mathematics.

Skytopia - 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.

Spirocharts - http://www.nehuenmultimedia.com.ar/html/spirograph.html A windows application that creates mathematically precise spirograph drawings; savable as images.

Stunning 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.

Table 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).

The 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

The 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).

The 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.

The Nine Digits Page - http://www.worldofnumbers.com/ninedig1.htm Puzzles and problems connected with numbers using the digits 1-9.

Wade Edward Philpott - http://www.gamepuzzles.com/wade.htm Profile and description of his mathematical games and puzzles.

Who 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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