Math Recreations

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


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

Competitions National
- Harvard-MIT Mathematics Tournament
- Balkan Mathematical Olympiad
- The Continental Mathematics League...
- Mathematical Challenge
- Furman Mathematics Tournament
- AMATYC Student Math League
- Canadian Mathematics Competition
- The Indian MO-Cell
- The Norwegian Mathematical Olympiad
- The Mandelbrot Competition
- Flanders Mathematics Olympiad
- Redwood Empire Mathematics Tournament
- Dutch Mathematics Olympiad
- American Regions Math League (ARML)
- British Mathematical Olympiad
- MathCounts
- Norwegian Mathematical Olympiad
- Irish Mathematical Olympiad

Competitions National (part 2)
- Math League
- Polish Mathematical Olympiad
- SMS: Singapore Mathematical Olympiad
- The Canadian Open Mathematics Chal...
- UCT Mathematics Competition
- UIUC Math Contests Webpage
- Bulgarian Competitions in Mathemat...
- Asian Pacific Mathematics Olympiad
- South Africa and the International...
- Canadian Mathematical Olympiad (CMO)

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

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

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

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

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

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

Specific Numbers Pi
- Fun With Pi
- The Uselessness of Pi and its Irra...
- A Common Book of Pi
- Pi Through the Ages
- Pauls Page of Pi
- Dales Pi Page
- Earth Mysteries : Notes on Pi
- Three141, a BBP Ruby implementatio...
- Ask Dr. Math: About Pi
- Pi, Pi, Mathematical Pi
- Pi Land
- The Joy of Pi
- How Pi?
- The Pi Song
- Ask Dr. Math - Pi
- Buffons Needle
- Calculating Pi
- A New Approach to the Universal Co...
- Land of Pi
- Lucy Scale Developments
- Pi 3.1416
- Pi Approximation Day
- Pi Patterns
- The Ridiculously Enhanced Pi Page
- Your Piece of the Pi
- A Slice of Pi Home Page
- A Tribute to Pi
- Elias Pi Page
- History and Philosophy of Pi
- How Stuff Works: Pi
- Indiana Pi Bill
- The Magic Piworld
- The Pi Trivia Game
- Pi-Dye : Pi and Math T-Shirts and ...
- The Constant Pi
- Pi World Ranking List
- The Pi Pages
- Ancient Pi: Knowers of the Universe
- Harry Smiths Brief History of Pi C...
- Pi Memorama

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

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

Specific Numbers Integers
- The Mystery of The Number 27
- Curious properties of 153
- All Numbers Are Interesting
- The 47 Society
- Seventeen and Yellow Pigs
- Number Facts and Trivia
- 666
- Count the Number of the Beast: 666
- The Number of the Beast
- One
- Nine
- Numbers
- Whats Special About This Number?

Specific Numbers Integers (part 2)
- About Big Numbers
- Bobs Positive Integer Pages
- Four
- Number of the Beast
- 37 Heaven
- Jewish Encyclopedia: Forty, the Number

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

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

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

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

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

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


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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


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

Competitions Kentucky
- Kentucky MathCounts

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

Competitions New Jersey
- New Jersey Math Counts

Competitions Massachusetts
- WPI Invitational Math Meet

Competitions New Mexico
- UNM-PNM Statewide Mathematics Contest

Competitions Florida
- David Essner Mathematics Competition

Competitions Louisiana
- Louisiana State University Mathema...

Competitions Oklahoma
- OSU High School Math Contest

Competitions Wisconsin
- Wisconsin Mathematics, Engineering...

Competitions Canada
- New Brunswick Math Competition

Competitions Ohio
- Calculus Competition