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|A large archive of mathematically inclined puzzles and problems displayed by category. Includes logic, number theory, geometry, probability and other problems. All are rated by difficulty and quality and discussed in depth by visitors. Most with solutions. New problems appear daily.|
|Levels:||High School (9-12)|
|Resource Types:||Problems/Puzzles, Word Problems, Web-Based Discussions|
|Math Topics:||Problem-Solving, Euclidean Plane Geometry, Logic/Foundations, Number Theory, Probability|
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