Problem of the Month (Popularity:  )
Posted by the Mathematics Department of Bilkent University.
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The Little Math Puzzle (Popularity: )
The Little Math Puzzle has been a K-12 Internet activity since 1995 for grades 5-9. Currently the puzzles have ceased ...
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John Handley High School Problem of the Week (Popularity: )
Weekly math problem with solutions and archive.
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Dansmath Problem of the Week (Popularity: )
Weekly math problem, with solutions, archive, and leader board.
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Brain Teasers by QBrute (Popularity: )
Original brain teasers with solutions.
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Magic Math Kingdom (Popularity: )
Learn math through games and quiz-oriented tutorial.
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The Enigmatic World of Philip Carter (Popularity: )
Collection of brain teasers from the author of IQ books.
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Perfect Times (Popularity: )
Teaches and assesses fluency of multiplication and division tables using online cards. Submit data and compare results.
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Mixed Up Math (Popularity: )
Logic problems, where equations are mixed up. In various formats like boxes, crosses, diagonals, mazes. Free download.
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Wu's Riddles (Popularity: )
A collection of riddles, puzzles, and technical interview questions, with a discussion forum.
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Mathematical Recreations (Popularity: )
Detailed exploration of a selection of mathematical topics.
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Nick's Mathematical Puzzles (Popularity: )
A collection of puzzles, with hints, solutions, and links to relevant mathematical topics.
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Paul Hsieh's Puzzles (Popularity: )
Logical and mathematical brain teasers, with an indication of difficulty. Hints are provided; solutions are available by email.
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The Contest Center (Popularity: )
Classic puzzles and riddles requiring only simple logic and elementary math.
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15 Puzzle of Sam Lloyd (Popularity: )
Play online Sam Lloyd's "15" puzzle The funny story of this game Mathematical implications of this game Some funny logical ...
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Torus and Klein Bottle Games (Popularity: )
Collection of Java-based educational puzzles.
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Mr Titen's More Than Math (Popularity: )
Mathematics teacher provides puzzles for students.
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The Puzzling World of Barry R. Clarke (Popularity: )
Brain teasers, articles and puzzles forum.
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Tile Tris (Popularity: )
Tile a spheroid working room aperiodically or periodically. Includes free demo download.
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MatheMajik (Popularity: )
Indian site featuring calculation tricks and math puzzles.
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