
Mathwizz (Popularity: )
http://www.mathwizz.com/
Interactive math problems for abilities ranging from middle school to university.


MatheMajik (Popularity: )
http://mathemajik.tripod.com/
Indian site featuring calculation tricks and math puzzles.


Free Puzzle Collections (Popularity: )
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.


Perfect Times (Popularity: )
http://www.perfecttimes.co.uk/
Teaches and assesses fluency of multiplication and division tables using online cards. Submit data and compare results.


Math Forum (Popularity: )
http://mathforum.org/
Resources, problems and forum for teachers and students in mathematics.


Pythabacus (Popularity: )
http://www.pythabacus.com/
Description and instruction of using the ancient Pythagorean Abacus to do arithmetic.


A+ Math (Popularity: )
http://www.aplusmath.com/
Interactive math help for K12 students with flashcards, Math Wordfind, Homework Helper and worksheets.


Mathschallenge.net (Popularity: )
http://mathschallenge.net/
A website dedicated to the puzzling world of mathematics and computer programming.


The Puzzling World of Barry R. Clarke (Popularity: )
http://barryispuzzled.com/
Brain teasers, articles and puzzles forum.


Aha! Puzzles (Popularity: )
http://www.ahapuzzles.com
Puzzles, books, games and tests with designed by Lloyd King, author of "Test Your Creative Thinking".


Alien Tiles (Popularity: )
http://www.alientiles.com/
Object of puzzle is to try to get color pieces to create certain patterns in cube.


Scott Kim (Popularity: )
http://www.scottkim.com/
Puzzles for web, computers, and print; ambigrams.


Mathematical Recreations (Popularity: )
http://www.mathrec.org/
Detailed exploration of a selection of mathematical topics.


Mathproblems.info (Popularity: )
http://mathproblems.info/
Over one hundred and fifty math problems ranging from basic math to differential equations.


Mathpuzzle.com (Popularity: )
http://www.mathpuzzle.com/
Celebrates math puzzles and mathematical recreations.
