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 DIRECTORY/Science/Tech/Math/Recreations/Games and Puzzles (73)
i015 Puzzle of Sam Lloyd - http://www.holotronix.com/samlloyd15.php - Play online Sam Lloyd's "15" puzzle. The funny story and mathematical implications of this game. Some funny logical problems with the 15 game.
 
i0A Primer on Cryptarithmetic - http://www.geocities.com/Athens/Agora/2160/primer.html - Instructions, examples, references and links.
 
i0A+ Math - http://www.aplusmath.com/ - Interactive math help for K-12 students with flashcards, Math Wordfind, Homework Helper and worksheets.
 
i0AIMS Puzzle Corner - http://www.aimsedu.org/puzzle/ - Provides over 100 puzzles with the goal of creating an engaging learning environment.
 
i0Aha! Puzzles - http://www.ahapuzzles.com - Puzzles, books, games and tests with designed by Lloyd King, author of "Test Your Creative Thinking".
 
i0Algebraic Math Puzzles - http://www.lifesmith.com/mathpuz1.html - A collection of puzzles at high school level. Does not include answers.
 
i0Alien Tiles - http://www.alientiles.com/ - Object of puzzle is to try to get color pieces to create certain patterns in cube.
 
i0Alphametic Puzzles - http://www.tkcs-collins.com/truman/alphamet/ - Numerous puzzles, links, puzzle solver, and a generator.
 
i0Ben Robinson's Cross-Number Puzzles - http://www.users.bigpond.com/bendr/xwd/numeric/index.html - A collection of cross-number puzzles: similar to crosswords, but using digits instead of letters. Many involve complex mathematical reasoning.
 
i0Brain Teasers and Maths Puzzles - http://www.syvum.com/teasers/ - Interactive logical and mathematical puzzles with feedback and detailed solutions.
 
i0Brain Teasers by QBrute - http://www.angelfire.com/empire/qbrute/ - Original brain teasers with solutions.
 
i0Calculus-Help Problem of the Week Archive - http://www.calculus-help.com/problem.html - Calculus based problems range from easy to difficult.
 
i0Colorful Mathematics - http://www.math.ucalgary.ca/~laf/colorful/colorful.html - Educational software presents advanced mathematics to K-12 students in a game-oriented approach, using coloring and drawing techniques to illustrate concepts from graph theory and computer science.
 
i0Contest Center Cryptarithms - http://www.contestcen.com/rithms.htm - Examples of cryptarithms, with prize competitions for subscribers.
 
i0Creative puzzles - http://www.creatievepuzzels.com/ - Interactive puzzle archive with descriptions for puzzle construction and a special children's puzzle page.
 
i0Dick's Math Puzzle Page - http://www.mod2.org/ - A collection of mathematical puzzles, some original, with fully worked solutions.
 
i0Downloadable and online games - http://www.gameintellect.com/ - A variety of Flash- and Java-based games and puzzles.
 
i0Free Puzzle Collections - http://www.freepuzzles.com/ - Educational and recreational puzzles for teachers, students and parents. Each puzzle is graded by difficulty and has a hint. Solutions are available to members.
 
i0Group Games - http://www.dmi.units.it/~logar/duek2/index_engl.html - Animations that develop the theory behind such puzzles as the Rubik cube.
 
i0Interactive Mathematics Miscellany and Puzzles - http://www.cut-the-knot.org/ - Java-based math resource including articles, puzzles and links.
 
i0Logic Puzzles - http://www.geocities.com/bob_kraus_2000/ - Collection of original numerical-logic puzzles. Many are long and difficult, involve sorting and comparing long lists and are intended to be solved using a good spreadsheet program.
 
i0Logicville - http://www.logicville.com/ - Educational puzzles, brain teasers, and word games such as anagrams, cryptograms, alphametics, doublets, tangrams.
 
i0Magic Math Kingdom - http://www.nes-lab.com/english2/ - Learn math through games and quiz-oriented tutorial.
 
i0Math Puzzles - http://www.math.utah.edu/~cherk/puzzles.html - Logic puzzles and riddles with some solutions.
 
i0MatheMagic - http://geocities.com/mathimoh/ - A collection of mathematical puzzles, jokes and articles.
 
i0MatheMajik - http://mathemajik.tripod.com/ - Indian site featuring calculation tricks and math puzzles.
 
i0Mathematical Games - http://www.madras.fife.sch.uk/maths/games/ - A collection of pencil and paper games with mathematical content. Many can be played through the site.
 
i0Mathematical Recreations - http://www.mathrec.org/ - Detailed exploration of a selection of mathematical topics.
 
i0Mathproblems.info - http://mathproblems.info/ - Over one hundred and fifty math problems ranging from basic math to differential equations.
 
i0Mathpuzzle.com - http://www.mathpuzzle.com/ - Celebrates math puzzles and mathematical recreations.
 
i0Mathschallenge.net - http://mathschallenge.net/ - A website dedicated to the puzzling world of mathematics, with a discussion forum.
 
i0Mathschallenge.net - http://mathschallenge.net/rss2.xml - A website dedicated to the puzzling world of mathematics.
 
i0Mathwizz - http://www.mathwizz.com/ - Interactive math problems for abilities ranging from middle school to university.
 
i0Mixed Up Math - http://www.kprobe.com/kprobe/mu.htm - Logic problems, where equations are mixed up. In various formats like boxes, crosses, diagonals, mazes. Free download.
 
i0Mr Titen's More Than Math - http://www.geocities.com/EnchantedForest/Tower/1133/ - Mathematics teacher provides puzzles for students.
 
i0Nandor's Exhaustive Chemical Words Pages - http://www.wellington.org/nandor/chemwords/chemwords.htm - Lists all the English words, word squares, and magic squares that can be written using chemical symbols.
 
i0Nick's Mathematical Puzzles - http://www.qbyte.org/puzzles/rss2.xml - A collection of puzzles, with hints, solutions, and links to related mathematical topics.
 
i0Nick's Mathematical Puzzles - http://www.qbyte.org/puzzles/ - A collection of puzzles, with hints, solutions, and links to related mathematical topics.
 
i0Paul Hsieh's Puzzles - http://www.azillionmonkeys.com/qed/puzzles.html - Logical and mathematical brain teasers, with an indication of difficulty. Hints are provided; solutions are available by email.
 
i0Perfect Times - http://www.perfect-times.co.uk/ - Teaches and assesses fluency of multiplication and division tables using online cards. Submit data and compare results.
 
i0Polyhedra Links - http://britton.disted.camosun.bc.ca/jbpolyhedra.htm - Pastime and activity links for various geometric patterns, polygons and polyhedra by Jill Britton.
 
i0Polymorf - Symmetry of Polyhedra - http://www.polymorf.net/ - A demonstration of the symmetry and transformational properties of the Platonic and Archimedean solids.
 
i0Puzzle of the Week Archives - http://ecg.mit.edu/george/puzzles/ - A collection of puzzles, with hints and full solutions. Compiled by George Moody.
 
i0Pythabacus - http://www.pythabacus.com/ - Description and instruction of using the ancient Pythagorean Abacus to do arithmetic.
 
i0Scott Kim - http://www.scottkim.com/ - Puzzles for web, computers, and print; ambigrams.
 
i0Storkey: Two Envelope Paradox - http://homepages.inf.ed.ac.uk/amos/doubleswap.html - A tough but simply defined problem which demonstrates key issues in probability.
 
i0The Contest Center - http://www.contestcen.com/classic.htm - Classic puzzles and riddles requiring only simple logic and elementary math.
 
i0The Enigmatic World of Philip Carter - http://www.knowl.demon.co.uk/ - Collection of brain teasers from the author of IQ books.
 
i0The Little Math Puzzle - http://www.sprucelog.com/lmp/ - The Little Math Puzzle has been a K-12 Internet activity since 1995 for grades 5-9. Currently the puzzles have ceased but the site maintains complete archives of past problems.
 
i0The Puzzling World of Barry R. Clarke - http://barryispuzzled.com/ - Brain teasers, articles and puzzles forum.
 
i0Torus and Klein Bottle Games - http://www.geometrygames.org/TorusGames/index.html - Collection of Java-based educational puzzles.
 
i0Wu's Riddles - http://www.ocf.berkeley.edu/~wwu/riddles/intro.shtml - A collection of riddles, puzzles, and technical interview questions, with a discussion forum.
 
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