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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A Primer on Cryptarithmetic (Popularity: )
Instructions, examples, references and links.
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A+ Math (Popularity: )
Interactive math help for K-12 students with flashcards, Math Wordfind, Homework Helper and worksheets.
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Aha! Puzzles (Popularity: )
Puzzles, books, games and tests with designed by Lloyd King, author of "Test Your Creative Thinking".
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AIMS Puzzle Corner (Popularity: )
Provides monthly puzzles with the goal of creating an engaging learning environment.
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Algebraic Math Puzzles (Popularity: )
A collection of puzzles at high school level. Does not include answers.
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Alien Tiles (Popularity: )
Object of puzzle is to try to get color pieces to create certain patterns in cube.
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Alphametic Puzzles (Popularity: )
Numerous puzzles, links, puzzle solver, and a generator.
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Alphametics and Cryptarithms (Popularity: )
Puzzles in which letters or symbols are substituted for the digits in an arithmetical operation like addition.
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Alphametics Page (Popularity: )
Compiled by Mike Keith. Examples of various genres.
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Archive Creative puzzles (Popularity: )
Interactive puzzle archive with descriptions for puzzle construction and a special childrens puzzle page.
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Baylor Problem of the Month (Popularity: )
Monthly problems with archive and results.
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BCIT Mathematical Entertainment (Popularity: )
Famous mathematical problems, puzzles, facts, games and trivia.
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Bradley University Problem of the Week (Popularity: )
Weekly math problem and archive from Professor Alberto L. Delgado.
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Brain Teasers and Maths Puzzles (Popularity: )
Interactive logical and mathematical puzzles with feedback and detailed solutions.
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Brain Teasers by QBrute (Popularity: )
Original brain teasers with solutions.
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Calculus-Help Problem of the Week (Popularity: )
Calculus based problems range from easy to difficult.
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Colorful Mathematics (Popularity: )
Educational software presents advanced mathematics to K-12 students in a game-oriented approach, using coloring and drawing techniques to illustrate concepts ...
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Contest Center Cryptarithms (Popularity: )
Examples of cryptarithms, with prize competitions for subscribers.
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Dansmath Problem of the Week (Popularity: )
Weekly math problem, with solutions, archive, and leader board.
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