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Mathematical

Websites
Classic and original puzzles.
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Jim Loy's Puzzle Page  My puzzle pages have been chosen, by Learning in Motion, as one of the top ten educational sites on the WWW (for October 2000 I received this email: I discovered your site looking for info on Figure Logic puzzles. It's...
http://www.jimloy.com/puzz/puzz.htm

Collection of math and logic puzzles ranging in levels of difficulty.
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The Truth Tree's Math and Logic Board  Special message to andrew We already have a contestant named andrew whose password is different. I have logged your answers under the username andrew2 with the password you gave Remi On this page you will find a collection of problems...
http://www.truthtree.com/mathdoor.html

Monthly logic puzzles with solving grids.
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The Hardest Puzzle Ever  Click on the movie poster below 3) Enter our new site 4) Find the link to Dave's logic puzzles. hint (Are you in Dave's top 10...
http://members.aol.com/dfcurran/logic/logicpuz.html

Monthly logic and math puzzles set by IBM researchers with solutions.
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IBM Research Ponder This  You are cordially invited to match wits with some of the best minds in IBM Research. Seems some of us can't see a problem without wanting to take a crack at solving it. Does that sound like you? Good. Forge...
http://www.research.ibm.com/ponder/

Answers to technical interview questions, programming problems, and brain teasers.
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answers to technical interview questions  Answers to technical interview questions accepting donations for dogs homefaqreadingfeedbackdiscussarchivefogcreekbugtrackingpets in nypetfinder *new* techInterview biblethankyourbrainsaveadog'slife Mt. Fuji William Poundstone recently published a book on techinical interview questions. It covers everything from the specific puzzles and how to answer them to...
http://www.techinterview.org/

A forum and collection of brain teasers, logic problems, math problems, paradoxes, science games, probability, riddles, and geometric shapes. The puzzles are searchable and categorized, most have solutions.
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perplexus.info logic puzzles, brainteasers, riddles and math tricks  All about flooble fun stuff Get a free chatterbox Free JavaScript Avatars perplexus dot info Home Welcome to perplexus.info, flooble's perplexing puzzle portal. Here, we collect all sorts of puzzles, from simple logic questions and word tricks to in-depth math...
http://perplexus.info/

A probability theory puzzle with solutions. [English and German.]
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The Monty Hall Problem  The following problem is taken from a quiz show on TV that really existed (or still exists It is an interesting topic to discuss in almost any group of people because even the most intelligent often get into trouble, and...
http://www.remote.org/frederik/projects/ziege/

Information on polyominos and square puzzles.
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pascal huybers homepage. mathematic jigsaw puzzels and arithmatic jigsawpuzzels with tetris pieces polyforms poly-forms polyominos pentominos and the beat the computer puzzels by Tenyo Japan mathematics mathematical brain teasers computers solve these puzzles with a backtracking algorithm  Mathemetic jigsaw puzzels Ordinary jigsaw puzzles are good fun. When two pieces fit perfectly you are quite certain this is correct and you can continue with the remaining pieces. In fact the puzzle gets more simple after each placed piece....
http://home.hetnet.nl/~paslen/jigsawpuzzles.html

Describes aspects of a critical problem and apparent paradox in probability theory.
http://jamaica.u.arizona.edu/~chalmers/papers/envelope.html

Discussion board hosted at Berkeley with talk about a variety of solved and unsolved brain teasers.
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wu forums hard  Register wu forums riddles hard (Moderators: william wu, towr, Icarus) Pages: 123 14 Start new topic Subject Started by Replies Views Last post Unsolved Problems in the Hard Forum 171; Pages 1 2 187; Icarus 28 6300 Jun 25th, 2005,...
http://www.ocf.berkeley.edu/~wwu...yabb/YaBB.cgi?board=riddles_hard

Tangram which creates hundreds of birds including geometry, tasks, solutions and downloads.
http://michael.bischoff.bei.t-online.de/index%20uk.htm

Claims that the two envelope paradox comes from the incorrect use of probabilities.
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Amos Storkey Brain Teasers: Two Envelope Paradox Solution  Viasul iulslin of thethe mnoth Hough Transform Amos Storkey Money Trouble Solution This is my solution to the Two Envelope Paradox. Many other people have said their bit. A google search returns a few. The best way, in my mind,...
http://www.anc.ed.ac.uk/~amos/doubleswapsoln.html

Use the clues provided to deduce the correct sequence of numbers in the hidden code.
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QuickLogicPuzzles.com: Deductive Puzzle-Solving's Home Page  Javascript should be enabled for full use of site features. HomeLatest PuzzleAll PuzzlesLogicCustomizedContact Hint for w001 Puzzle above. For the solution What Are Quick Logic Puzzles? Each Quick Logic Puzzle challenges your powers of deduction and sharpens them, as well....
http://www.robertwilliams.org/qlp/index.html

Contains puzzles and games with solutions.
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 Alta en buscadores con resultados garantizados Gana popularidad en Google y gana visitas...
http://uk.geocities.com/oscarlagioia/riddles.html

JavaScript example of the Monty Hall Game. This game demonstrates the real (empirical) affect of statistics. [Does not display correctly in all browsers.]
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Monty Hall Game  This mathematical puzzle challenges human intuition with an apparant conflict between reason and empirical statistics. It's an ideal challenge for gamblers before they hit the gambling casino. For rules and more details, see Monty Hall Game Rules. Start Game This...
http://montyhallgame.shawnolson.net/

Some mathematical puzzles with answers and/or a hint.
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Logic puzzles.  A triangle and a square are drawn inside a circle so that the circle passes through all the corners of the square and all the points of the triangle. Place Xs on the drawing so that 1) exactly two Xs...
http://www.leisureideas.com/logic%20puzzles.htm

Shareware game based around an extension of the game of life.
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Conway's Game of Life as action, strategy and puzzle games free download  Download the game for a free trial (231 Kb) Register via RegNow 9.95) 30 day money back guarantee! Register via Share-It 9.95 less than 8 Euros Description This game is an entertaining extension of the famous Conway's Game of Life:...
http://www.cellfighter.com/conways-life-download.html