Fantastic range of quality jigsaw puzzles. From stunning new designs to traditional favourites. Ranging from the relaxing to the ultra challenging. Immediate delivery of every puzzle.

Unique gift idea: puzzle with photo. Different formats, from £ 6.66.

Buy a Jigsaw Puzzle at SHOP.COM.

Play online Sam Lloyd's "15" puzzle. The funny story and mathematical implications of this game. Some funny logical problems with the 15 game.

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

Instructions, examples, references and links.

Provides over 100 puzzles with the goal of creating an engaging learning environment.

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

A collection of puzzles at high school level. Does not include answers.

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

Numerous puzzles, links, puzzle solver, and a generator.

Compiled by Mike Keith. Examples of various genres.

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

Interactive puzzle archive with descriptions for puzzle construction and a special childrens puzzle page.

A collection of cross-number puzzles: similar to crosswords, but using digits instead of letters. Many involve complex mathematical reasoning.

Interactive logical and mathematical puzzles with feedback and detailed solutions.

Original brain teasers with solutions.

Calculus based problems range from easy to difficult.

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.

Examples of cryptarithms, with prize competitions for subscribers.

A collection of mathematical puzzles, some original, with fully worked solutions.

A variety of Flash- and Java-based games and puzzles.

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

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

Java-based math resource including articles, puzzles and links.

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.

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

Learn math through games and quiz-oriented tutorial.

Logic puzzles and riddles with some solutions.

A collection of mathematical puzzles, jokes and articles.

Indian site featuring calculation tricks and math puzzles.

A collection of pencil and paper games with mathematical content. Many can be played through the site.

Detailed exploration of a selection of mathematical topics.

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

Celebrates math puzzles and mathematical recreations.

A website dedicated to the puzzling world of mathematics, with a discussion forum.

A website dedicated to the puzzling world of mathematics.

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

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

Mathematics teacher provides puzzles for students.

Lists all the English words, word squares, and magic squares that can be written using chemical symbols.

A collection of puzzles, with hints, solutions, and links to related mathematical topics.

A collection of puzzles, with hints, solutions, and links to related mathematical topics.

Logical and mathematical brain teasers, with an indication of difficulty. Hints are provided; solutions are available by email.

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

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

A demonstration of the symmetry and transformational properties of the Platonic and Archimedean solids.

Archive of problems and solutions, compiled by Dr Alec Mihailovs of Shepherd College.

A collection of puzzles, with hints and full solutions. Compiled by George Moody.

A variety of challenging geometrical and arithmetical puzzles, many with solutions.

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

Math challenges Southwest Missouri State University in three levels of difficulties.

Puzzles for web, computers, and print; ambigrams.

With links to related sites. Compiled by Torsten Sillke.

A tough but simply defined problem which demonstrates key issues in probability.

Classic puzzles and riddles requiring only simple logic and elementary math.

Collection of brain teasers from the author of IQ books.

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.

Brain teasers, articles and puzzles forum.

Collection of Java-based educational puzzles.

A collection of riddles, puzzles, and technical interview questions, with a discussion forum.