1. Mathematical Games, Toys, And Puzzles Mathematical games, Toys, and puzzles. Look, my first award has a recreational mathematics page, where he collects geometry "junk". (He's obviously thinking of the sort of junkyard http://compgeom.cs.uiuc.edu/~jeffe/mathgames.html

My web site has moved; please update your links and bookmarks! Mathematical Games, Toys, and Puzzles Look, my first award! Many thanks to Planet Science for picking this as their Site of the Day for April 26, 1996. (Unfortunately, you need to register to see their stuff.) While you're here, take a look at some of my other pages , too. Sorry about the dust. Several of these pages have moved or died in the last few months, and there's lots of new stuff I need to add, but I've been busy with my real job . Thanks for your patience. Contents Contents Combinatorial Games Game Theory (and Game Theorists) Actual Games ... Silly Math! Combinatorial Games Mathematicians use the words "game theory" in two different senses. The more common sense of the word includes things like the Prisoner's Dilemma, poker, the New York Stock Exchange, or other "imperfect-information" games. Research in this type of game theory makes a lots of money for a lot of people, and has even resulted in a few Nobel prizes. An introductory sketch is available at Drexel University. Those aren't the kind of mathematical games I like. Combinatorial game theory tries to analyze the outcomes of "perfect-information" games like Nim and Tic-tac-toe. More difficult real-world examples are Hex, Reversi, Mancala, Checkers, Chess, Shogi, and Go. Nancy Casey has a

2. AAA Math - Games, Puzzles And Riddles Sites for math games, puzzles and riddles for grades K8 Brain Teasers. Clever games for Clever People. Coolmath.com. Funbrain games. Interactive geometry. Learning Planet. Mathematical puzzles . http://www.aaamath.com/game.html

Absurd Math Brain Teasers Clever Games for Clever People Coolmath.com ... Monster Math Computer Games Computer Games PC Games Mac Games Education and Reference Software ... Children's Software Video Games PlayStation Sega Dreamcast Nintendo 64 Game Boy ... Video Game Hardware Toys and Games Back to Basics Games Kids and Family Games Most Popular Toys Index of Exercises ... Learning Aids Grade School Levels: Kindergarten First Second Third ... World Levels Arithmetic Topics: Addition Algebra Comparing Counting ... Subtraction

3. Coolmath.com - An Amusement Park Of Math And More! Designed For FUN! An amusement park of mathematics. puzzles and number problems, fractals, geometry, calculus, algebra, online games, online calculators, and links. http://www.coolmath.com/

Coolmath.com: An amusement park of math designed for fun! Coolmath Sponsors (Ad Links): Find out how to get a link here! Insurance And Loans Bad Credit Loans Home Equity Loans ... Please help us serve you better by completing a demographic survey. Results will only be used internally for new lessons, etc. and for our sponsors HELP SUPPORT COOLMATH link to us make a donation sponsorships text link advertising ... ScienceMonster.com Thanks for visiting Coolmath.com

4. Interactive Mathematics Miscellany And Puzzles MSET99 Talk. games puzzles. Arithmetic/Algebra. geometry. Probability. Eye Opener MAA monthly column. Awards. games and puzzles. Arithmetic and Algebra. geometry http://www.cut-the-knot.com/

5. Interactive Mathematics Miscellany And Puzzles, Geometry MSET99 Talk games puzzles Arithmetic/Algebra geometry Probability Eye Opener Analog Gadgets Inventor s Paradox Did you know? http://www.cut-the-knot.org/geometry.shtml

CTK Exchange Front Page Movie shortcuts Personal info ... Recommend this site Interactive Mathematics Miscellany and Puzzles Geometry Page 3 Utilities Puzzle 4 Travelers problem 9-point Circle as a Locus of Concurrency [Java] A Case of Similarity [Java] A Geometric Limit A problem with equilateral triangles [Java] About a Line and a Triangle [Java] Altitudes [Java] Altitudes and the Euler Line [Java] An Isoperimetric Theorem [Java] Angle Bisectors [Java] Angle Bisectors in a Quadrilateral [Java] Angle Preservation Property [Java] Angle Trisection [Java] Angle Trisectors on Circumcircle [Java] An Old Japanese Theorem Apollonian Gasket [Java] Apollonius Problem [Java] Archimedes' Method Area of Parallelogram [Java] Arithmetic-Geometric Mean Inequality Assimilation Illusion [Java] Asymmetric Propeller [Java] Barbier, The Theorem of [Java] Barycentric coordinates Barycentric coordinates and Geometric Probability Bender: A Visual Illusion [Java] Bisecting arcs Bisecting a shape Bottema's theorem [Java] Bounded Distance Brahmagupta's Theorem [Java] Brianchon's theorem [Java] Bride's Chair [Java] Bulging lines illusion [Java] Butterfly Theorem A Better Butterfly Theorem The Lepidoptera of the Circles [Java] Two Butterflies Theorem [Java] Cantor Set and Function Cantor sets [Java] C - C Cantor's Theorem [Java] Carnot's Theorem Carnot's Theorem Carnot's Theorem (Generalization of Wallace's theorem) [Java] Centroid, a Characteristic Property Of

6. The Golden Section - The Number And Its Geometry Simple definitions; exact value and first 2000 decimal places; finding the golden section; continued fractions. Simple tricks for your calculator, puzzles and games. http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/phi.html

The Golden section ratio: Phi Contents of this Page The icon means there is a Things to do investigation at the end of the section. The icon means there is an interactive calculator in this section. What is the Golden Ratio (or Phi)? A simple definition of Phi A bit of history... Links on Euclid and his "Elements" ... More What is the golden section (or Phi)? We will call the Golden Ratio (or Golden number) after a greek letter, Phi ) here, although some writers and mathematicians use another Greek letter, tau ). Also, we shall use phi (note the lower case p) for a closely related value. A simple definition of Phi There are just two numbers that remain the same when they are squared namely and . Other numbers get bigger and some get smaller when we square them: Squares that are bigger Squares that are smaller is 4 is 9 is 100 One definition of Phi (the golden section number) is that to square it you just add 1 or, in mathematics:

7. Interactive Mathematics Miscellany And Puzzles, Games Page Math puzzles. Interactive education. games and puzzles. Most illustrated with Jva applets MSET99 Talk. games puzzles. Arithmetic/Algebra. geometry. Probability. Eye Opener http://www.cut-the-knot.com/games.html

CTK Exchange Front Page Movie shortcuts Personal info ... Recommend this site Interactive Mathematics Miscellany and Puzzles Games and Puzzles 3 glass puzzle [JavaScript] 3 glass puzzle , second, more general tool [JavaScript] 4 Knights [Java] 7 Coins Puzzle [Java] A Baffling Prediction The Aliquot Game [Java] Bachet's Magic Trick [Java] The Blithe 12 puzzle [Java] Bogus Nim [Java] Box Labels [Java] Calendar Magic [Java] Changing Colors [Java] Cryptarithms [JavaScript, Frames] Date Game [Java] Euclid's Game [Java] Farmer and Wife To Catch Rooster and Hen [Java] The game of Fif [Java] Fish Soup Game [Java] Flipping pancakes [Java] Gergonne Magic Trick [Java] Gordian Knot The Happy 8 puzzle. [Java] Invitation to MasterMind [Java] Jam [Java] A legend of Josephus Flavius [Java] Kayles [Java] Latin Squares [Java] Lewis Carroll's problem [JavaScript] Looping Chips [Java] The Lucky 7 puzzle. [Java] Magic in Square [Java] The Magic Squares game [JavaScript, Frames] Merlin's Magic Squares [Java] A Matter of Age Mazes [Java] Monty Hall Dilemma [JavaScript] The game of Nim explained [JavaScript, Frames]

8. Math (geometry of the Ancients) Challenging!! Back to Top. Back to Top. 8. Online Logic puzzles/games Battleship; Peg Solitare; Cut The Knot; Elementary Brain Teasers; http://www.k111.k12.il.us/king/math.htm

Back to King's Home Page King's List of On-line Math Activities click on Calculator to see links this page was compiled and is maintained by Mrs. DeWitt Many of these programs need shockwave: (if you don't have it ..it is free) Beginning Math Activities Basic Facts Basic Math Skills Factors/Multiples ... ISAT 8th Grade Word List Beginning Math Activities BBC Education's Number Time Games Simple Add and Subtract Test the Toad + and - problems with numbers 1-15) Little Animals Activity Center ( interactive number games for addition and subtraction) Number Recognition/Sequencing Dart Board Level 1 (recognize numbers 1-9) Find the Number (Recognition activity for numbers 1-10) Mend the Number Square ( Place missing numbers on 1-100 grid) Find One More (matching game) Snakes and Ladders (1 player or 2 player activity.. works like chutes and ladders) Watch Addem (Number Movies) Number Songs FunBrain Activities Number Recognition/Sequencing Bunny Count ( count and match numbers and characters) One False Move (sequence numbers from lowest to highest) Guess the Number (guess number with high low clues) Learning Planet Activities Number Recognition/Counting/Sequencing Count Your Chickens ( counting activity) 1 2 3 Order (what comes next... up to 10)

9. Cool Math Sites Really Cool Math Websites! Algebra Sites! geometry Sites! Even Discrete Math, Trigonometry and Calculus Sites! Math puzzles and Math Brain Teasers Sites! Math Web Quest Sites! Math Humor! here that no longer work, please email me! games, puzzles, Problems, Brain Teasers More Fun http://www.cte.jhu.edu/techacademy/web/2000/heal/mathsites.htm

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10. Paper Models Of Geometric Shapes & Puzzles From FreePaperToys.com Science Fiction Spacecraft Trains/Buses Main Menu. Paper Model geometry, games puzzles. 3d puzzles Plus Build Stuff Crafts 4 http://www.freepapertoys.com/pt-geometric.html

FreePaperToys.com Summer Fun Bed-in-a-Bag Flamingos Scale Models ... Wizard of Oz Quick Menu: Airplanes/Fly Airplanes/Model Animals Boats ... Art Tower Mito - Make a tower from single sheet of paper! Build a Buckey Ball Boxes from OriLand Construction Set by Torsten Drees Dodecahedron Maze Dome, diamond.. etc Douglas Zongker Polyhedra models Five Intersecting Tetrahedra - from origami mathematics FracDo Game of Life Games To Make Geometric Objects ... Geodesic Club House - Child size play house out of newspaper! Geodesic dome GeoDome Playhouse - made from card board. Golden Mean Dome Grafica Obscura - interesting Hextix Puzzle - Tetrahedron puzzle, diagonal burr puzzle How to Cut a 5-Pointed Star in One Snip How to make business card cubes HyperGami - Also JavaGami JustSystem Corporation - Dodecahedral Earth paper model Lattice Cubes Life size Arch made from paper by Maarten van Gelder Marivi's World of Boxes - Alphabet Shaped Boxes MM's Modular Mania Make Your Own Dome Model Paper models of Polyhedra Paper Polyhedra ... Patented polyhedra design by Ron Resch - from Geometry Junkyard Pavilion of Polyhedreality Penultimate Modular Origami Photo Cube ... PolyMod - Program that creates 3-dimensional polyhedrons

11. Web Resources - Activities, Games, Puzzles And Software Interactive Mathematics Miscellany and puzzles This site includes topics on arithmetic, algebra, geometry, probability, games, puzzles, proofs, math as language http://www.glencoe.com/sec/math/cool/activities.htm

Activities, Games, Puzzles and Software The Abacus This Java version of the abacus is a limited simulation of a real abacus. The AIMS Puzzle Corner This site offers a tantalizing educational bait-and-hook in the form of a new puzzle each month that infiltrates the classroom with a vibrant brand of problem solving. Buffon's Needle Use the java applet on this page to see a simple Monte Carlo method for the estimation of the value of pi, 3.14159265... Clever Games for Clever People Many of us have used logic and numbers to explain how to win a game, but mathematician John Conway was not about to do something so ordinary. In his book, On Numbers and Games , he takes that idea and turns it inside out by showing how games can be used to describe numbers. Colorful Mathematics A series of educational software presenting advanced mathematical concepts to K-12 students using a game-oriented approach Create a Graph Create area, bar, line, and pie graphs online.

12. The Geometry Junkyard: Toys CIX and Triamant geometric construction sets, from Design Science Toys. Delta Blocks. Kadon Enterprises, makers of games and puzzles including polyominoes http://www.ics.uci.edu/~eppstein/junkyard/toys.html

Interlocking Puzzle Pieces and other Geometric Toys Astro-Logix 3d ball-and-stick geometric construction kit. Atoma polyhedral building set. CalmPlex puzzles . Reassemble a chessboard cut into twelve interlocking polyominos. CIX and Triamant geometric construction sets, from Design Science Toys. Delta Blocks . Hop David discusses ideas for manufacturing building blocks based on the tetrahedron-octahedron space tiling depicted in Escher's "Flatworms". Design Science Toys Die-cast metal polyhedra available for sale from Pedagoguery Software. Fractiles , multicolored magnetic rhombs with angles based on multiples of pi/7. Happy cubes and other three-dimensional polyomino puzzles. Interlocking Puzzles LLC are makers of hand crafted hardwood puzzles including burrs, pentominoes, and polyhedra. Kadon Enterprises , makers of games and puzzles including polyominoes and Penrose tiles. Lego Pentominos , Eric Harshbarger. He writes that the hard part was finding legos in enough different colors. See also his Lego math puzzles page. LiveCube polycube puzzle building toy.

13. Math.com Puzzles, Games, And Contests Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents, and everyone can find solutions to their math problems instantly. More games http://www.math.com/students/puzzles/puzzleapps.html

Home Teacher Parents Glossary ... Email this page to a friend More Games Peg Solitaire Fiver Hare and Hounds Tower of Hanoi ... Maze Generator Resources Cool Tools References Test Preparation Study Tips ... Wonders of Math Search Math isn't only about numbers - math skills are found in puzzles and games too. Take a look at this collection of games from all over the world. (Java required) Peg Solitaire Also known as a board game called Hi-Q Fiver A simple and surprisingly addictive puzzle. Hare and Hounds A 19th-century board game invented in France, also called The Military Game . It was popular among French army officers during and after the Franco-Prussian war. Tower of Hanoi The classic puzzle, a favorite of programmers and Buddhist monks. TacTix Created by the brilliant Danish inventor Piet Hein, TacTix is a variation of Nim, one of the oldest of mathematical games. Hex-7 An elegant game of strategy invented in the 1940's, Hex is no longer available commercially but has recently seen an increase in popularity.

14. The Geometry Junkyard: Polyominoes Pentomino projectof-the-month from the geometry Forum. Pentomino HungarIQa. What happens to standard pentomino puzzles and games if you use poly-rhombs http://www.ics.uci.edu/~eppstein/junkyard/polyomino.html

Polyominoes and Other Animals Connected subsets of the square lattice tiling of the plane are called polyominoes . These are often classified by their number of squares, so e.g. a tetromino has four squares and a pentomino has five; this nomenclature is by analogy to the word "domino" (a shape formed by two connected squares, but unrelated in etymology to the roots for "two" or "square"). If a polyomino or a higher-dimensional collection of cubes forms a shape topologically equivalent to a ball, it is called an animal . A famous open problem asks whether any animal in three dimensions can be transformed into a single cube by adding and removing cubes, at each step remaining an animal (it is known that removal alone does not always work). Other related figures include polyiamonds (collections of equilateral triangles), polyabolos (collections of half-squares), and polyhexes (collections of regular hexagons). Anna's pentomino page . Anna Gardberg makes pentominoes out of sculpey and agate. Arranging six squares . This Geometry Forum problem of the week asks for the number of different hexominoes, and for how many of them can be folded into a cube. NebulaSearch: Polyomino Blocking polyominos . R. M. Kurchan asks, for each k, what is the smallest polyomino such that k copies can form a "blocked" configuration in which no piece can be slid free of the others, but in which any subconfiguration is not blocked.

15. Math Forum: Geometry Problems And Puzzles the Week Annie Fetter, the Math Forum The geometry Problem of MacTutor Math History Archives Number games, geometrical puzzles, network problems http://mathforum.org/geometry/geom.puzzles.html

Geometry Problems and Puzzles Back to Geometry Classroom Materials Math by Subject K12 Topics algebra arithmetic calculus discrete math geometry pre-calculus prob/stat Advanced Topics analysis calculus diff. equations game theory discrete math geometry (coll.) geometry (adv.) linear algebra modern algebra num. analysis Problems and Puzzles - Geometry This list contains some of the best geometry problem and puzzle sites. For a more exhaustive list, or to find materials that fit your specific needs, search or browse Geometry or Problems and Puzzles in the Forum's Internet Mathematics Library. 20,000 Problems Under the Sea - MathPro Press An online reference to mathematical problems, comprising a searchable database of 20,000+ math problems from journals and contests including the ... A+ Math A site developed to help elementary school students improve their math skills interactively, offering: educational math games (learn basic operations ... AMOF: The Amazing Mathematical Object Factory - Canada's SchoolNet Combinatorial objects are everywhere. How many ways are there to make change for $1 using unlimited numbers of coins of all denominations? Each way is ...

16. Interactive Learning With Games, Puzzles, Quizzes Interactive Mathematics Miscellany and puzzles, games. http//www.cutthe-knot.com/games.shtml. Math English Programs , games, Worksheets. Interactive geometry. http://www.monroe.k12.la.us/~tltc/active_learn.htm

Active Learning with Online Games, Puzzles, and Quizzes ELEMENTARY GRADES http://www.babloo.com/ Children's Storybooks Online http://www.magickeys.com/books/index.html http://www.funschool.com/ Games categorized by Grade Levels. Alphabet Fun http://www.billybear4kids.com/games/online/alphabet/alphabet.htm Interactive alphabet game that lets students see words that begin with each of the letters of the alphabet. 15 Puzzle http://www.netrover.com/~kingskid/javanew99/piecepuzz/puzz15.html Students put the numerals 1 – 15 in numerical order, much like the old slider puzzles, but interactive. Clifford’s Interactive Storybooks http://teacher.scholastic.com/clifford1/ Students read Clifford (The Big Red Dog) stories and complete sentences within the story or play Concentration, Make a Word, Letter Match, or Sound Match. Learning Planets Interactive Games Interactive games in several subject areas. Hiyah.com The Library

17. Solid Geometry - Link Page Math for Kids Find great resources and articles on topics like algebra, geometry, math uses in daily life, fun games, puzzles, history of math and much much http://www.hopepaul.com/links/links.htm

Astro-logix - the evolutionary new construction toy Three puzzles with polyhedra and numbers We present in this site a deltoidal icositetrahedron puzzle, a rhombicuboctahedron puzzle and a rhombic dodecahedron puzzle. It is allowed to print copies for non-commercial purposes. Contact: Jorge Rezende (rezende@cii.fc.ul.pt) 5-stone Play a strong Renju/Go-Moku(five-in-a-row) game Contact: Tongxiang Zhang Bubble Bomb and Photo Hunt Game Bubble bomb game and Photo Hunt game for adult and kids! Contact: viersee (support@qkiz.com) Geometria Learn and teach solid geometry with this Java software. It runs just as well on a PC (Windows, Linux) as a Sun computer. 60 sample problems with resolutions. Contact: Stelian Dumitrascu (stelian@ottawa.com) Math for Kids Contact: Nikki Katz (kidsmath.guide@about.com) Maryann Sterling's Art Clipart, Art, Desktop Pictures and Postcards Contact: Maryann Sterling (Maryann@maryannsart.com) Carla's Creations Site has free online greeting cards, a humor section, html help pages, info about me and my family, banner exchange, holiday and seasonal pages and great links!! Fractiles, Inc.

18. CanadaSEEK.com - Games : Puzzles For inteligent people only . charades, puzzles, riddles, enigmas, problems, math, geometry, crime, games, free ( Added/Updated http://www.canadaseek.com/Games/Puzzles/index.php

Hosting - $4.16! Banner Exchange What's New What's Cool ... Contact Us June 09th, 2004 Main Menu Home Topics Contact Us Recommend Us ... Your Account Web Directory Categories Add a Site Modify a Site What's New ... Search Links Check Mail Username: Password: Free Web Based E-mail. Sign Up Now For Free. Report lurid usernames or spam immediately to abuse@canadaseek.com Home Games Links Free online Jigsaw Puzzles pop Free online jigsaw puzzles of nature: animals, flowers, sea, plus cartoons and NASA. More coming. ( Added/Updated: 24-May-2000 Votes: Rating: Rate us Report Deadlink 21st Software Games - Puzzles, Simulations, Card Games Free demos Full version PC game demo downloads: card games: Blackjack Solitaire Cribbage, Jigsaw Puzzles, Simulation: 1863 Gettysburg, and Earthquake. ( Added/Updated: 24-May-2000 Votes: Rating: Rate us Report Deadlink Amic Games - JigSaw 4000 A fine jigsaw puzzle game with a huge collection of beautiful jigsaws ( over 450! ) made from awensome photography. All the well known features included. Try it now! ( Added/Updated: 8-Jun-2002 Votes: Rating: Rate us Report Deadlink Bardagram Acrostic and Word Search Puzzles Free weekly printable acrostic puzzles and word searches, some based on works of the Bard, William Shakespeare.

19. Puzzle Index AreYouGame.com games and puzzles, geometry puzzles Click the puzzle number to view the puzzle http://www.freepuzzles.com/puzzles/PuzzleIndex.asp?Category=Geometry&CategoryID=

20. Lewis Carroll Logic, Mathematics, And Games Obtuse problem Cat s Grin; Cats and rats problem; Euclidean geometry and Architecture; Math. games, puzzles, Riddles of Lewis Carroll. http://www.lewiscarroll.org/logic.html

Updated March 12, 2004 Lewis Carroll Logician and Mathematician Someone sent me this quoted text in reference to a request and I thought it would make a suitable introduction for this page. From Colliers CD Rom Encyclopedia. Biographies A short biography of Dodgson as Mathematician. Just the basics. Algebra, computers, Boole and Carroll Maths Year 2000 Logic of Lewis Carroll A logic puzzle with a Carroll influence. An interactive pillow problem. Insomnia gives one so much more time to create fun problems. Syllogisms Sorites, a class of syllogism Karnaugh Maps and CarrollDiagrams with some comments Carroll's Paradox What the Tortoise Said to Achilles Mathematics of Lewis Carroll Alice in Mathland Computer Science and Why Science, Language, and Literature by Matthew Belmonte. Chapter 2 of this book contains a few instances of 19th century abstract algebraic thought in Carroll's works. An interactive math teaching site Analysis of Dodgson's 1876 voting system Algorithm to find day of the week Date algorithm again ... Search on lewis carroll for sum of squares Obtuse problem Cats and rats problem Euclidean Geometry and Architecture Math Games, Puzzles, Riddles of Lewis Carroll

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