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"..
AIMS Puzzle Corner - Provides over 100 puzzles with the goal of creating an engaging learning environment..
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 Page - Compiled by Mike Keith. Examples of various genres..
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..
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..
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..
The Little Math Puzzle - 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..
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 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 Games - A collection of pencil and paper games with mathematical content. Many can be played through the site..
Nick's Mathematical Puzzles - A collection of puzzles, with hints, solutions, and links to related mathematical topics..
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..
15 Puzzle of Sam Lloyd - Play online Sam Lloyd's "15" puzzle. The funny story and 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..