See also:

• Games: Puzzles  (756)

A+ Math - - Interactive math help for K-12 students with flashcards, Math Wordfind, Homework Helper and worksheets.

Aha! Puzzles - - Puzzles, books, games and tests with designed by Lloyd King, author of "Test Your Creative Thinking".

Algebraic Math Puzzles - - A collection of puzzles at high school level. Does not include answers.

Alien Tiles - - Object of puzzle is to try to get color pieces to create certain patterns in cube.

Alphametic Puzzles - - Numerous puzzles, links, puzzle solver, and a generator.

Alphametics and Cryptarithms - - Puzzles in which letters or symbols are substituted for the digits in an arithmetical operation like addition.

Alphametics Page - - Compiled by Mike Keith. Examples of various genres.

Archive Creative puzzles - - Interactive puzzle archive with descriptions for puzzle construction and a special childrens puzzle page.

BCIT Mathematical Entertainment - - Famous mathematical problems, puzzles, facts, games and trivia.

Ben Robinson's Cross-Number Puzzles - - A collection of cross-number puzzles: similar to crosswords, but using digits instead of letters. Many involve complex mathematical reasoning.

Brain Teasers and Maths Puzzles - - Interactive logical and mathematical puzzles with feedback and detailed solutions.

Brain Teasers by QBrute - - Original brain teasers with solutions.

Clever Games for Clever People - - Games that interest John Conway including Rim and Traffic Jam.

Colorful Mathematics - - 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.

The Contest Center - - Classic puzzles and riddles requiring only simple logic and elementary math.

Contest Center Cryptarithms - - Examples of cryptarithms, with prize competitions for subscribers.

Curious Numbers - - A tribute to the lighter side of math including puzzles, humor, trivia, quotes, inspirations, and math links.

The Enigmatic World of Philip Carter - - Collection of brain teasers from the author of IQ books.

Free Puzzle Collections - - Educational and recreational puzzles for teachers, students and parents. Each puzzle is graded by difficulty and has a hint. Solutions are available to members.

Group Games - - Animations that develop the theory behind such puzzles as the Rubik cube.

Interactive Mathematics Miscellany and Puzzles - - Java-based math resource including articles, puzzles and links.

iQED! - - Lateral puzzles from "Puzzles for the High IQ" author Lloyd King and founder of The Puzzle Wizards SiteRing.

Ken Duisenberg's Puzzle of the Week Archives - - Challenging puzzles and problems.

Logic Puzzles - - 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.

Logicville - - Educational puzzles, brain teasers, and word games such as anagrams, cryptograms, alphametics, doublets, tangrams.

Magic Math Kingdom - - Learn math through games and quiz-oriented tutorial.

Math Forum - - Resources, problems and forum for teachers and students in mathematics.

Math Puzzles - - Logic puzzles and riddles with some solutions.

MatheMagic - - A collection of mathematical puzzles, jokes and articles.

MatheMajik - - Indian site featuring calculation tricks and math puzzles.

Mathematical Recreations - - Detailed exploration of a selection of mathematical topics.

Mathproblems.info - - Over one hundred and fifty math problems ranging from basic math to differential equations.

Mathpuzzle.com - - Celebrates math puzzles and mathematical recreations.

Mathschallenge.net - - A website dedicated to the puzzling world of mathematics and computer programming.

Mathwizz - - Interactive math problems for abilities ranging from middle school to university.

Mixed Up Math - - Logic problems, where equations are mixed up. In various formats like boxes, crosses, diagonals, mazes. Free download.

Mr Titen's More Than Math - - Mathematics teacher provides puzzles for students.

Nandor's Exhaustive Chemical Words Pages - - Lists all the English words, word squares, and magic squares that can be written using chemical symbols.

Nick's Mathematical Puzzles - - A collection of puzzles, with hints, solutions, and links to related mathematical topics.

The Null Set - - Puzzles collected by Guy Kindler, most requiring some undergraduate mathematical knowledge. Some hints are provided.

Paul Hsieh's Puzzles - - Logical and mathematical brain teasers, with an indication of difficulty. Hints are provided; solutions are available by email.

Perfect Times - - Teaches and assesses fluency of multiplication and division tables using online cards. Submit data and compare results.

Polyhedra Links - - Pastime and activity links for various geometric patterns, polygons and polyhedra by Jill Britton.

Polymorf - Symmetry of Polyhedra - - A demonstration of the symmetry and transformational properties of the Platonic and Archimedean solids.

A Primer on Cryptarithmetic - - Instructions, examples, references and links.

15 Puzzle of Sam Lloyd - - 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.

Puzzle of the Week Archives - - A collection of puzzles, with hints and full solutions. Compiled by George Moody.

Puzzles of Leonid Mochalov - - A variety of challenging geometrical and arithmetical puzzles, many with solutions.

The Puzzling World of Barry R. Clarke - - Brain teasers, articles and puzzles forum.

Pythabacus - - Description and instruction of using the ancient Pythagorean Abacus to do arithmetic.

Scott Kim - - Puzzles for web, computers, and print; ambigrams.

Sequence Puzzles and Problems - - With links to related sites. Compiled by Torsten Sillke.

SMSU Problem Corner - - Math challenges Southwest Missouri State University in three levels of difficulties.

Storkey: Two Envelope Paradox - - A tough but simply defined problem which demonstrates key issues in probability.

Tile Tris - - Tile a spheroid working room aperiodically or periodically. Includes free demo download.

Torus and Klein Bottle Games - - Collection of Java-based educational puzzles.

Wu's Riddles - - A collection of riddles, puzzles, and technical interview questions, with a discussion forum.

Mathschallenge.net - - A website dedicated to the puzzling world of mathematics and computer programming. [RSS.

Nick's Mathematical Puzzles - - A collection of puzzles, with hints, solutions, and links to related mathematical topics. [RSS.