Brain Teasers and Math Puzzles
interactive with immediate scoring.
Cut the Knot
interactive mathematics miscellany and puzzles.
FunBrain.com Math Baseball
players must answer math questions correctly to score runs in this baseball game.
Little Math Puzzle Contest, The
open to all participants but designed for students in grades 5 through 10.
Mathpuzzle.com
celebrates math puzzles and mathematical recreations.
Mathwizz
problems and help for K-12, loan and mortgage calculators, and fun links.
Playful Thoughts
recreational math problems.
Problem Site, The
provides math problems, brainteasers, and riddles online. These puzzles aid in developing problem solving and lateral thinking skills.
thrackle.org
dedicated to John Conway"s thrackle problem.
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