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Sponsored Links:
Mathwizz (Popularity:  )
http://www.mathwizz.com/
Interactive math problems for abilities ranging from middle school to university.
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Wu's Riddles (Popularity: )
http://www.ocf.berkeley.edu/~wwu/riddles/intro.shtml
A collection of riddles, puzzles, and technical interview questions, with a discussion forum.
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MatheMajik (Popularity: )
http://mathemajik.tripod.com/
Indian site featuring calculation tricks and math puzzles.
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Brain Teasers and Maths Puzzles (Popularity: )
http://www.syvum.com/teasers/
Interactive logical and mathematical puzzles with feedback and detailed solutions.
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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.
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Quia! Mathematics Activities (Popularity: )
http://www.quia.com/dir/math/
Educational activities for teaching mathematics including concentration, matching, flash cards, word search puzzles, and Java games.
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Contest Center Cryptarithms (Popularity: )
http://www.contestcen.com/rithms.htm
Examples of cryptarithms, with prize competitions for subscribers.
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Math Forum: Elementary Problem of the Week (Popularity: )
http://mathforum.org/elempow/
A weekly interactive project for elementary school mathematics. Past problems, solutions, and student Recognition.
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Math Forum: Discrete Math Problem of the Week (Popularity: )
http://mathforum.org/dmpow/
Past problems and solutions, student Recognition.
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Perfect Times (Popularity: )
http://www.perfect-times.co.uk/
Teaches and assesses fluency of multiplication and division tables using online cards. Submit data and compare results.
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Alphametic Puzzles (Popularity: )
http://www.tkcs-collins.com/truman/alphamet/
Numerous puzzles, links, puzzle solver, and a generator.
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Magic Math Kingdom (Popularity: )
http://www.nes-lab.com/english2/
Learn math through games and quiz-oriented tutorial.
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Math Forum: Precalculus POW (Popularity: )
http://mathforum.org/precalcpow/
Weekly math problems and solutions from Math Forum.
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Pythabacus (Popularity: )
http://www.pythabacus.com/
Description and instruction of using the ancient Pythagorean Abacus to do arithmetic.
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Math Forum (Popularity: )
http://mathforum.org/
Resources, problems and forum for teachers and students in mathematics.
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Math Forum: Geometry Problem of the Week (Popularity: )
http://mathforum.org/geopow/
Past archive and solutions. Recieve help from mentor.
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A+ Math (Popularity: )
http://www.aplusmath.com/
Interactive math help for K-12 students with flashcards, Math Wordfind, Homework Helper and worksheets.
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Interactive Mathematics Miscellany and Puzzles (Popularity: )
http://www.cut-the-knot.com/content.html
Java-based math resource including articles, puzzles and links.
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Mathschallenge.net (Popularity: )
http://mathschallenge.net/
A website dedicated to the puzzling world of mathematics and computer programming.
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Colorful Mathematics (Popularity: )
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.
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