- A+ Math - http://www.aplusmath.com/
Interactive math help for K-12 students with flashcards, Math Wordfind, Homework Helper and worksheets.
- Colorful 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.
- Pythabacus - http://www.pythabacus.com/
Description and instruction of using the ancient Pythagorean Abacus to do arithmetic.
- Mathwizz - http://www.mathwizz.com/
Interactive math problems for abilities ranging from middle school to university.
- Archive Creative puzzles - http://www.creativepuzzels.nl
Interactive puzzle archive with descriptions for puzzle construction and a special childrens puzzle page.
- MatheMagic - http://geocities.com/mathimoh
A collection of mathematical puzzles, jokes and articles.
- Mathschallenge.net - http://mathschallenge.net/
A website dedicated to the puzzling world of mathematics and computer programming.
- Math Forum - http://mathforum.org/
Resources, problems and forum for teachers and students in mathematics.
- Logicville - http://www.logicville.com/
Educational puzzles, brain teasers, and word games such as anagrams, cryptograms, alphametics, doublets, tangrams.
- MatheMajik - http://mathemajik.tripod.com/
Indian site featuring calculation tricks and math puzzles.
- Polymorf - Symmetry of Polyhedra - http://www.polymorf.net/
A demonstration of the symmetry and transformational properties of the Platonic and Archimedean solids.
- iQED! - http://homepage.ntlworld.com/atalanta
Lateral puzzles from "Puzzles for the High IQ" author Lloyd King and founder of The Puzzle Wizards SiteRing.
- Mr Titen's More Than Math - http://www.geocities.com/EnchantedForest/Tower/1133/
Mathematics teacher provides puzzles for students.
- Tile Tris - http://members.lycos.co.uk/tiletris/
Tile a spheroid working room aperiodically or periodically. Includes free demo download.
- Magic Math Kingdom - http://www.nes-lab.com/english2/
Learn math through games and quiz-oriented tutorial.
- Perfect Times - http://www.perfect-times.co.uk/
Teaches and assesses fluency of multiplication and division tables using online cards. Submit data and compare results.
- Mixed 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.
- The Null Set - http://www.princeton.edu/~mathclub/puzzles.html
Puzzles collected by Guy Kindler, most requiring some undergraduate mathematical knowledge. Some hints are provided.
- Wu's Riddles - http://www.ocf.berkeley.edu/~wwu/riddles/intro.shtml
A collection of riddles, puzzles, and technical interview questions, with a discussion forum.
- Nick's Mathematical Puzzles - http://www.qbyte.org/puzzles/
A collection of puzzles, with hints, solutions, and links to related mathematical topics.
- Paul 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.
- The Contest Center - http://www.contestcen.com/classic.htm
Classic puzzles and riddles requiring only simple logic and elementary math.
- 15 Puzzle of Sam Lloyd - http://www.holotronix.com/samlloyd15.php
Play online Sam Lloyd's "15" puzzle The funny story of this game Mathematical implications of this game Some funny logical problems with the 15 game.
- SMSU Problem Corner - http://math.smsu.edu/%7Eles/POTW.html
Math challenges Southwest Missouri State University in three levels of difficulties.
- Math Puzzles - http://www.math.utah.edu/~cherk/puzzles.html
Logic puzzles and riddles with some solutions.
- Alien Tiles - http://www.alientiles.com/
Object of puzzle is to try to get color pieces to create certain patterns in cube.
- Alphametic Puzzles - http://www.tkcs-collins.com/truman/alphamet/
Numerous puzzles, links, puzzle solver, and a generator.
- Scott Kim - http://www.scottkim.com/
Puzzles for web, computers, and print; ambigrams.
- Sequence Puzzles and Problems - http://www.mathematik.uni-bielefeld.de/~sillke/SEQUENCES/
With links to related sites. Compiled by Torsten Sillke.
- Clever Games for Clever People - http://www.cs.uidaho.edu/%7Ecasey931/conway/games.html
Games that interest John Conway including Rim and Traffic Jam.
- Alphametics and Cryptarithms - http://www.mathematik.uni-bielefeld.de/~sillke/PUZZLES/ALPHAMETIC/
Puzzles in which letters or symbols are substituted for the digits in an arithmetical operation like addition.
- Alphametics Page - http://members.aol.com/s6sj7gt/mikealp.htm
Compiled by Mike Keith. Examples of various genres.
- Logic 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.
- Mathpuzzle.com - http://www.mathpuzzle.com/
Celebrates math puzzles and mathematical recreations.
- Algebraic Math Puzzles - http://www.lifesmith.com/mathpuz1.html
A collection of puzzles at high school level. Does not include answers.
- Group Games - http://www.dsm.univ.trieste.it/%7Elogar/duek2/index_engl.html
Animations that develop the theory behind such puzzles as the Rubik cube.
- Free 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.
- Aha! Puzzles - http://www.ahapuzzles.com
Puzzles, books, games and tests with designed by Lloyd King, author of "Test Your Creative Thinking".
- Storkey: Two Envelope Paradox - http://www.anc.ed.ac.uk/~amos/doubleswap.html
A tough but simply defined problem which demonstrates key issues in probability.
- Mathproblems.info - http://mathproblems.info/
Over one hundred and fifty math problems ranging from basic math to differential equations.
- Nick's Mathematical Puzzles - http://www.qbyte.org/puzzles/rss2.xml
A collection of puzzles, with hints, solutions, and links to related mathematical topics.
- Puzzle of the Week Archives - http://ecg.mit.edu/george/puzzles/
A collection of puzzles, with hints and full solutions. Compiled by George Moody.
- Curious Numbers - http://www.geocities.com/mrsjennifercall/jennifer_math.htm
A tribute to the lighter side of math including puzzles, humor, trivia, quotes, inspirations, and math links.
- Polyhedra Links - http://britton.disted.camosun.bc.ca/jbpolyhedra.htm
Pastime and activity links for various geometric patterns, polygons and polyhedra by Jill Britton.
- Ben 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.
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