Math Recreations

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Polyominoes
- Pentominoes
- Six Squares Problem
- A Dissection Puzzle
- Pentominos Puzzle Solver
- My Polyomino Page
- Pentomino Dissection of a Square A...
- Java pentominoes
- Pentomino Homepage
- Pentomino Relationships
- Gamepuzzles
- A Pentominoes Project from Belgium
- Schröder Triangles, Paths, and Par...
- Henri Picciottos Geometric Puzzles...
- Pentomino Covers
- Dancing Links
- Flexagons
- George Huttlins Puzzle Page
- Golygons
- Mathforum : Tiling Rectangles from Ell
- Packing Shapes
- Mathforum : Minimal Domino Tiling
- Miroslav Vichers Puzzles Pages
- Square into Similar Triangles
- Primes of a 14-omino
- Polyform and Dissection Puzzle Links
- Tiling of Pythagorean Triplets
- Pentomino HungarIQa
- Packing Polyominoes
- Pentomino Puzzles.
- Pentominoes : an Introduction
- Polygon Puzzle
- Pentomino Applet
- Tesselating Locking Polyominos
- Thorleifs SOMA Page
- Tiling a Square With Eight Congrue...
- Pentomino Applet
- Pento-Mania
- Cynthia Lanius Lesson: Polyominoes...
- Arnabs Pentominos Puzzle
- Animal Enumerations
- Gerards Universal Polyomino Solver
- Maximum Convex Hulls of Connected ...
- Logical Art and the Art of Logic
- Lego Pentominos
- Knights Move Tessellations
- Hyperbolic Planar Tessellations
- Annas Pentomino Page
- Blocking Polyominos
- Canonical Polygons
- Christopher Moncktons Eternity Puzzle
- Counting Horizontally Convex Polyo...
- Eithans Pentominoes-3D Applet Solver
- Equilateral Pentagons
- Eternity Page
- Flexagons
- Livio Zuccas polyomino-covered cube
- Mathforum : a Pentomino Problem
- Pairwise Touching Hypercubes
- Pentamini Pentaminos Pentominoes
- Isoperimetric Polygons
- Gerards Pentomino Page
- Golygons by Mathworld
- Harold McIntoshs Flexagon Papers
- Hepto
- Hexiamonds
- Information on Pentomino Puzzles
- Pento
- Pentominos
- Polyominoes
- Polyominoes: Theme and Variations
- Polyominoids
- Polypolygon Tilings
- Puzzle Fun
- Random Domino Tiling of an Aztec D...
- Rectifiable Polyomino
- Solomon W. Golomb
- Soma Cube Applet
- Polyominoes
- Polyomino Tiling
- Polyomino Fuzion Game
- Pentominos
- Polyform Spirals
- Polyforms
- Polyiamond Exclusion
- Polyiamonds
- Polyomino and Polyhex Tiling
- Polyomino Applet
- Polyomino Enumeration
- Somatic
- Sqfig and Sqtile
- Tiling Stuff
- Tiling with Notched Cubes
- Unbalanced Anisohedral Tiling
- Unbeatable Tetris
- Unfolding the Tesseract
- What is a Golygon?
- Xominoes
- Tiling Rectangles and Half Strips ...
- Tiling and Packing Results of Tors...
- Taniguchis Programs
- The Geometry Junkyard: Polyominoes
- The Mathematics of Polyominoes
- The Pentomino Dictionary by Gilles...
- The Poly Pages
- The Soma Cube
- The Three Dimensional Polyominoes ...
- The Tiling Puzzle Games of OOG
- Three Nice Pentomino Coloring Problems


Games and Puzzles
- Math Puzzles
- Logic Puzzles
- Algebraic Math Puzzles
- The Contest Center
- Puzzles of Leonid Mochalov
- Brain Teasers and Maths Puzzles
- Free Puzzle Collections
- Mathproblems.info
- Brain Teasers by QBrute
- Group Games
- Mathschallenge.net
- Nicks Mathematical Puzzles
- Sequence Puzzles and Problems
- AIMS Puzzle Corner
- Aha! Puzzles
- A Primer on Cryptarithmetic
- 15 Puzzle of Sam Lloyd
- Alphametic Puzzles
- Mathematical Recreations
- MatheMajik
- MatheMagic
- Magic Math Kingdom
- Contest Center Cryptarithms
- Logicville
- Alphametics and Cryptarithms
- The Puzzling World of Barry R. Clarke
- The Little Math Puzzle
- Archive Creative puzzles
- Mixed Up Math
- Mathschallenge.net
- Mathpuzzle.com
- Perfect Times
- Ben Robinsons Cross-Number Puzzles
- Colorful Mathematics
- Dicks Math Puzzle Page
- Mathematical Games
- Downloadable and online games
- A+ Math
- The Enigmatic World of Philip Carter
- Nicks Mathematical Puzzles
- Nandors Exhaustive Chemical Words ...
- Mr Titens More Than Math
- Mathwizz
- Paul Hsiehs Puzzles
- Polyhedra Links
- Torus and Klein Bottle Games
- Wus Riddles
- Storkey: Two Envelope Paradox
- SMSU Problem Corner
- Scott Kim
- Pythabacus
- Puzzle of the Week Archives
- Polymorf - Symmetry of Polyhedra
- Alphametics Page
- Interactive Mathematics Miscellany...
- Calculus-Help Problem of the Week ...
- Alien Tiles
- Mathematical Problems - Problem So...
- Fibonacci numbers and the Pascal t...
- Fast Arithmetic Tips
- Famous Curves
- Geometric Packing Problems
- Mathematical Diversions
- Number Recreations by Shyam Sunder...
- Table of Numbers Problem
- The Nine Digits Page
- Treasure Troves : Book List
- A Disproof of Pythagoras Theorem?
- MAA Library List in Recreational M...
- Math Magic By Computer
- Mathematical Fiction
- Mathematical Induction
- Mathematical Lego Sculptures
- Rubiks Cube Lecture Notes
- Math Forum: Algebra Problem of the...
- SimonSingh.net
- Math Forum: 2002 Mathematics Game
- Recreational Mathematics Forum
- Roman Numerals
- Mathematics in Art and Architecture
- Mathematik
- Recreational Mathematics Topics
- A Mathematicians Aesthetics
- Origami Mathematics
- Who Can Name the Bigger Number?
- Eureka
- On the Puzzles with Polyhedra and ...
- The Diamond 16 Puzzle
- Cryptarithms Online
- The Aesthetics of Symmetry
- CuriousMath
- David Singmaster: List of Availabl...
- Final Answers
- Jlpes Number Recreations Page
- Recreational Mathematics (David Ep...
- Recreational Mathematics
- HAKMEM
- Recreational and Educational Computing
- Recmath
- Properties of Dice
- Spirograph
- Spirocharts
- Skytopia - Super Magnet
- Stunning Friends with Math Magic
- Sportlab
- Sir Roger Penrose
- MAT 007 I News
- Look and Say Sequence Generator
- Math Forum: 2001 Mathematics Game
- Mathematical Quotation Server
- Maze Classification and Algorithms
- Math in the Movies
- Famous Curves Index
- Fair Dice
- Critical Math
- Back to Square One
- Iamond
- How To Manually Find A Square Root
- Gardner Index
- Fun With Mathematics
- One Metaphor Fits All
- Narcissistic Numbers
- Mudd Math Fun Facts
- Mathmos
- Mathematrix
- Mathematische Basteleien
- Mathematical Spectrum
- Mathematical Quotation Server
- Mathematics Museum (Japan)
- Wade Edward Philpott Collection
- Wade Edward Philpott
- The Sound of Mathematics
- The Eugène Strens Recreational Mat...

Competitions Problem Archives
- Prof. W. Kahans Notes and Problems
- Problem Page
- Math Olympiads
- Madras College Mathematics Departm...
- Problem Writing For Mathematics Co...
- Mathematics Problem Solving
- USSR Math Olympiad, 1961-1986
- Resources for the Putnam Mathemati...
- Tournament of Towns at Toronto
- Math Olympiad Problems from Around...
- Putnam Problem Solving
- Olympiad Math Madness
- Singapore International Mathematic...
- Kalva
- IMO Problems
- International Mathematical Talent ...
- Union College Putnam Club

Competitions International
- Australian Primary Schools Mathema...
- Rocket City Math League
- Countries with Olympiad Sites
- IMO and National Olympiads
- Vojtech Jarnik Mathematical Compet...
- Math Olympiad for Elementary Schools
- William Lowell Putnam Competition
- International Math Competition for...
- IMO 2006
- IMO Network
- Singapore International Mathematic...
- IMO and Other Competitions
- IMO 1995
- IMO 1996
- IMO 1997
- IMO 2001
- IMO 2000
- IMO 1999
- Mental Calculation World Cup 2004
- IMO 2004
- IMO 2003

Competitions Training
- Problem Solving References & R...
- Ravi Vakil (Stanford)
- Mathematics Olympiad Lecture Notes
- Madras College Mathematics Departm...
- Greg Martin (UBC)

Games and Puzzles Problem of the Week
- Math Forum: Geometry Problem of th...
- Dansmath Problem of the Week
- PuzzleUp
- Problem of the Month
- Math Magic
- Math Forum: Math Fundamentals Prob...
- John Handley High School Problem o...
- Math Forum: Algebra Problem of the...
- Mathematics Problem Solving Task C...
- Math Forum: Problems of the Week
- Ken Duisenbergs Puzzle of the Week
- Stony Brook Problem of the Month
- Columbus State University - Proble...
- Macalester College Problem of the Week
- Monthly Problem
- Problem of the Fortnight
- Purdue University Problem of the Week
- Trent University Problem of the Week
- Math Forum: Discrete Math Problems...
- Bradley University Problem of the Week
- IBM Research Ponder This

Tessellations
- Tessellations
- Squared Squares and Squared Rectangles
- Escher Patterns
- Tessellations Using Geometers Sket...
- The Geometry Junkyard: Tilings
- Grotesque Geometry
- Totally Tessellated
- Williams Geometric Construction Page
- Hops Escher Tessellation Tiles
- Tessellations with Java
- Hyperbolic Tessellations
- Landry Art
- Penrose Tiles
- References about Tessellations
- Samanthas Wallpaper Page
- Symmetries, Patterns and Tessellations
- Tessellation and Photography
- Tessellations: Technology and Culture
- Catalogue of Isohedral Tilings
- Tilings and Geometric Ornament
- Chaos Tiles
- Discrete Plane Symmetry Groups
- Escher Web Sketch
- Frieze Patterns
- Gallery of Symmetric Chaos
- Hans Kuiper
- Intriguing Tessellations
- Investigating Patterns: Symmetry a...
- Artlandia SymmetryWorks
- 17 Wall Paper Symmetry Groups to C...
- Java Kali
- Java Penrose Tiler
- Tessellation Links
- Tessellation Tutorials by Suzanne ...
- The 14 Different Types of Convex P...
- The Penrose Tiling at Miami University
- The Seventeen Wallpaper Groups
- Tiling Plain and Fancy
- Tessellating Wallpaper Patterns
- Tessellated, Interlocking Concrete...
- TESS
- KaleidoTile
- Mike Field
- Pentagons that Tile the Plane
- Symmetry and Pattern: The Art of O...
- Symmetry and the Shape of Space
- Symmetry and the Shape of Space
- Wallpaper Groups
- Quasi-Periodic Tilings

Competitions National
- Balkan Mathematical Olympiad
- Asian Pacific Mathematics Olympiad
- Harvard-MIT Mathematics Tournament
- Mathematical Challenge
- Polish Mathematical Olympiad
- Redwood Empire Mathematics Tournament
- SMS: Singapore Mathematical Olympiad
- South Africa and the International...
- The Norwegian Mathematical Olympiad
- Bulgarian Competitions in Mathemat...
- British Mathematical Olympiad
- American Regions Math League (ARML)
- Math League
- MathCounts
- The Canadian Open Mathematics Chal...
- The Indian MO-Cell
- Canadian Mathematics Competition
- Flanders Mathematics Olympiad
- Furman Mathematics Tournament
- UIUC Math Contests Webpage
- Norwegian Mathematical Olympiad
- Canadian Mathematical Olympiad (CMO)
- AMATYC Student Math League
- Dutch Mathematics Olympiad
- Irish Mathematical Olympiad
- The Continental Mathematics League...
- The Mandelbrot Competition
- UCT Mathematics Competition

Competitions Online Contests
- Florida-Stuyvesant Alumni Mathemat...
- Online Math Madness
- MATHmodels
- International Mathematical Talent ...
- Crazy for Math Online Contest
- International Space Visualization ...
- Paper Challeran
- International Mathematics Tourname...
- ABACUS International Math Challenge
- Mathematical Contest in Modeling (...
- USA Mathematical Talent Search (US...

Competitions
- Putnam Exam Information
- Australian Mathematics Trust
- Mathematics Archives
- Valentin Vornicus MathLinks
- Math Competitions in USA
- Crux Mathematicorum with Mathemati...
- American Mathematics Competitions

Magic Square
- Ulearn Today : article on Magic Sq...
- Magic Cubes
- Magic Squares
- Magic Cubes
- Magic Square Puzzle
- Magic Squares at Math Cats: Fun, E...
- Prime Magic Squares
- Notes on Magic Squares
- Multimagic Squares
- Mathpages: Franklins Magic Squares
- Finding Magic Squares Using CCM
- Constructing all Magic Squares of ...
- PrimePuzzle #297. Queens on magic ...
- The Anti-Magic Square Project
- Siamese Method
- Program on Hyper Magic Cubes
- Visual Magic Squares and Group Orb...
- Science News for Kids: MatheMUSEments
- Simple Magic Square Checker
- Skeleton Magic Squares
- The 3x3 Distinct Prime Magic Squar...
- The Magic Encyclopedia
- The Magic Square Record
- The Perfect Solutions for the Magi...
- The Zen of Magic Squares, Circles,...
- A Very, Very Magic Square
- All You Wanted to Know About Magic...
- Allmath.com: Magic Squares Game
- Amof: Info on Magic Squares
- Making Magic Squares
- Math Forum: Magic Squares Applet
- Math Forum: Magic Stars
- Math Forum: Multiplying Magic Squares
- Math Forum: Suzanne Alejandre: Mag...
- Mathpages: Solving Magic Squares
- MathWorld: Magic Squares
- MathWorld: Panmagic Square
- Nested Magic Squares
- Magic Squares, Magic Stars and Oth...
- Magic Squares by Edward W. Shinema...
- Magic Squares and Hyper Cubes
- Generalized Magic Objects
- Grogs Magic Squares
- Java applet
- MAA: Ivars Petersons MathLand: Mor...
- Magic Cubes and Tesseracts
- Magic Rectangles and Squares
- Magic Squares
- Magic Squares

Competitions Minnesota
- Minnesota Junior High School Mathe...
- SCSU Math Contest
- Minnesota MathCounts
- Minnesota High School Math League
- Math Masters of Minnesota

Specific Numbers
- Square root of 2
- Fibonacci Numbers and the Golden s...
- Arabic numerals
- Indian numerals
- Just Who is Mr. 666?
- Mathemagic
- The Golden Pentagon
- Triangular Numbers
- World of Numbers
- Fun With Numbers
- FAQ on Special Numbers
- Ask Dr. Math: History of the Terms...
- Catalans Constant - G
- Number Gossip
- Pi Squared over Six
- RJNs More Digits of Irrational Numbers
- Stewys Site
- Sum Beastliness
- Vampire Numbers
- Verbose.net
- Wikipedia - Mathematical constant
- Notable Properties of Specific Numbers
- Mathematical Constants and Computation
- Bruns Constant
- Catalan Number -- MathWorld
- Euler-Mascheroni Constant - g
- Favorite Mathematical Constants
- Feigenbaum Constants
- Friedmanns S-Numbers
- Heilbronn Triangle Constants
- Inverse Symbolic Calculator
- Jewish Encyclopedia: Numbers and N...
- 37 Heaven
- Absolutely Abnormal Numbers
- Apérys Constant

Specific Numbers Fibonacci Numbers
- Fibonacci Quarterly
- Fibonacci Number-Theorists
- Fibonacci Numbers, the Golden Sect...
- Fibonacci Numbers Formulae
- Amof:Info on Fibonacci Sequences
- Fibonacci and Lucas Factorizations
- Fibonacci and Lucas Numbers
- Fibonacci Facts
- Fibonacci Numbers
- The Fibonacci Association
- Fibonacci Sequence
- Mongoven, Casey
- Textism
- The Life and Numbers of Fibonacci
- Willems Fibonacci site
- Extensions of the golden section a...
- Fibonacci Numbers
- Fibonacci Numbers and the Golden S...
- Fibonacci Numbers Spelled Out
- Fibonacci Numbers, Phi and the Gol...
- Animation of Binets formula for Reals
- 10th International Conference on F...
- Fibonacci resources

Specific Numbers Pi
- Pauls Page of Pi
- Fun With Pi
- Pi, Pi, Mathematical Pi
- Pi World Ranking List
- Lucy Scale Developments
- Pi 3.1416
- Pi Approximation Day
- Pi Land
- Pi Through the Ages
- History and Philosophy of Pi
- Dales Pi Page
- Earth Mysteries : Notes on Pi
- Elias Pi Page
- Harry Smiths Brief History of Pi C...
- Ancient Pi: Knowers of the Universe
- Indiana Pi Bill

Specific Numbers Pi (part 2)
- Ask Dr. Math - Pi
- Buffons Needle
- A Tribute to Pi
- A Slice of Pi Home Page
- A New Approach to the Universal Co...
- How Pi?
- How Stuff Works: Pi
- A Common Book of Pi
- Calculating Pi
- Ask Dr. Math: About Pi
- Land of Pi
- The Ridiculously Enhanced Pi Page
- The Uselessness of Pi and its Irra...
- Three141, a BBP Ruby implementatio...
- Your Piece of the Pi
- The Pi Trivia Game
- The Pi Song
- The Pi Pages
- Pi Memorama
- Pi Patterns
- Pi-Dye : Pi and Math T-Shirts and ...
- The Constant Pi
- The Joy of Pi
- The Magic Piworld

Competitions Australia
- UQ/QAMT Problem Solving Competition
- Queensland Mathematics Competitions

Competitions Maryland
- Johns Hopkins University High Scho...
- University of Maryland Math Compet...

Competitions Alabama
- Alabama Statewide Mathematics Contest
- The University of Alabama High Sch...
- Grissom High School Math Team
- Rocket City Math League

Specific Numbers e
- Some History Surrounding e
- E the EXPONENTIAL - the Magic Numb...
- Hunting e
- The Beauty of e
- The Scales Of e
- Esquared
- Exponential and Logarithmic Functions
- Exponential Review
- The Base for Natural Logarithms
- The Constant e
- The Eulers Number Home Page
- The Natural Logarithmic Base


Specific Numbers Integers
- One
- Numbers
- Jewish Encyclopedia: Forty, the Number
- Four
- Curious properties of 153
- About Big Numbers
- All Numbers Are Interesting
- Bobs Positive Integer Pages
- Count the Number of the Beast: 666
- Nine
- Number Facts and Trivia
- Number of the Beast
- 666
- 37 Heaven
- The 47 Society
- Seventeen and Yellow Pigs
- The Mystery of The Number 27
- The Number of the Beast
- Whats Special About This Number?

Competitions California
- Stanford Math Tournament
- Bay Area Math Circle
- Pomona College / University of Wis...
- Santa Clara University High School...
- Bay Area Math Meet

Competitions Texas
- Texas MathCounts
- Rice Mathematics Tournament
- Rice Mathematics Tournament

Flexagons
- Flexagons
- Flexagons
- Flexagon Reflexions
- Flexagons
- Hexaflexagon Toolkit
- Flexagons

Competitions Indiana
- Indiana State Mathematics Contest
- High School Math Contest
- Rose-Hulman High-school Mathematic...

Specific Numbers Poetry
- Poe, E.: Near a Raven
- PI Poem by Jesse Campbell
- Digit Connection
- Lizs Pi Poems
- Pi Poetry & Piaku

Competitions Singhs Code Book Challenge
- The Cipher Challenge
- Code Book Cipher Challenge Solutio...
- Plus Magazine - Singhs "Code ...

Competitions Missouri
- Great Plains Math League
- Math Field Day
- St. Louis Community College

Competitions South Carolina
- University of South Carolina High ...

Competitions New Jersey
- New Jersey Math Counts

Competitions Oklahoma
- OSU High School Math Contest

Competitions Wisconsin
- Wisconsin Mathematics, Engineering...

Competitions Kentucky
- Kentucky MathCounts

Competitions Louisiana
- Louisiana State University Mathema...

Famous Problems Monty Hall
- The Monty Hall Problem
- The Infamous Monty Hall Problem
- Monty Hall : Explanations of Solution
- Marilyn Vos Savants Monty Hall Problem
- Marilyn is Tricked by a Game Show Host
- Lets Make a Deal Strikes Again
- Cheap Monty Hall
- A New Approach to the Monty Hall P...
- Mathnet : The Car and the Goats
- Monty Hall
- The Straight Dope: On "Lets M...
- Monty Hall Dilemma

Famous Problems
- U of T Mathematics Network
- The Knights Tour Links Page

Competitions Georgia
- Armstrong Atlantic State Universit...
- Gainesville College Math Tournamen...
- University of Georgia High School ...

Competitions Illinois
- Illinois Council of Teachers of Ma...

Competitions Massachusetts
- WPI Invitational Math Meet

Competitions New Mexico
- UNM-PNM Statewide Mathematics Contest


Famous Problems Tower of Hanoi
- Tower of Hanoi
- Towers of Hanoi in sendmail.cf
- Patterns in the Towers of Hanoi So...
- François Edouard Anatole Lucas
- Discovering the Mathematics Behind...
- Ask Dr. Math : Tower of Hanoi

Competitions North Carolina
- North Carolina State Mathematics C...

Competitions Ohio
- Calculus Competition

Specific Numbers phi
- The Golden Mean
- The Golden Ratio
- The Golden Section - the Number an...
- The Golden Section
- The Golden Ratio: A Golden Opportu...
- The Golden Ratio and The Fibonacci...
- The Greeks and the Golden Mean
- Golden Number
- Golden Rectangle
- Golden`s Section Formulas
- Phi: That Golden Number
- The Phi-Nest
- The Golden Mean
- The Golden Mean by Jerry Bonnell a...
- The Golden Ratio
- The Golden Ratio
- Division in Mean and Extreme Ratio
- Constructing the Golden Rectangle
- 10,000 Digits
- 20,000 Digits
- A brief introduction to Golden Ratio
- American Phi
- Ask Dr. Math
- Ask Yahoo
- Colin and Gregs Golden Ratio Page
- The Golden Ratio

Specific Numbers Software
- HiPiLib - High Performance Libraries
- PiHex
- The Hfloat Page
- Stus pi page
- SourceForge.net: Project Filelist
- Roys Pi Page
- Archimedes And The Computation Of Pi
- Armpi 4 for the ARM processors
- Austins Wasted Cycles
- Computing Pi
- Efgs Computer Lab: Buffons Needle...
- Jasonps Pi programs
- Martins Pi Page
- Pi at Multiple Dimension

Specific Numbers Digits
- Beauty
- Search Pi to 40 Million Digits
- Science News Online: Pi à la Mode
- Search for strings within Pi
- Search for your Name in the Digits...
- Search within Pi
- The 100-Club
- The 1000 billionth binary digit of...
- The 2 Club
- The Search for Intelligence in Pi
- Ramanujan, Modular Equations, and ...
- Am I in Pi
- Are the Digits of Pi Random?
- Bailey and Crandalls article on t...
- How to Memorize Pi
- Is Pi normal?
- Pi
- Pi Memorize
- Project Gutenberg Pi Listing

Competitions Canada
- New Brunswick Math Competition

Competitions Florida
- David Essner Mathematics Competition

Specific Numbers 0 - Zero
- Zero
- The Digit Zero
- Zero in Four Dimensions

Specific Numbers Infinity
- Hotel Infinity
- Infinity
- Counting to Infinity
- Hector Parrs Essays: Infinity
- Mathnet : Does "Infinity"...
- The Infinity

Specific Numbers Calculation
- One Billion Digits of Pi
- Archimedes Approximation of Pi
- Bailey on Pi
- David Baileys Pi Directory
- Fabrice Bellards PI page
- John Mathews bibliography for Comp...
- Pi Calculations by the Buffons method

Famous Problems Online
- Tower of Hanoi
- Mathnet : The Tower of Hanoi
- Thinks.com - Tower of Hanoi