Surf these sites: A Base for Mathematical Puzzles -- Mathematical and logical puzzles and games. Resources for math and brain contests, exercises and solutions. BrainBashers -- Exciting logic, math and language puzzles as well as paradoxes for all puzzlaniacs. Code Breaker -- Encryption puzzles... solve for cash prizes... honorable mention for schools of code breaking math majors Kjartan Poskitt''s Puzzle Books -- Details of the Murderous Maths series, the Killer Puzzles. MCL Puzzles -- Mathematical, logical and physical puzzles of varying levels of difficulty. Puzzles from Math is For Fun -- Free samples on site updated every Sunday. Cross numbers targeted on specific arithmetical processes, ideal for classroom use (Printable). Our competition page has puzzles taken from PuzzleFrenzy. QuantumBrainBenders -- A series of entertaining arithmetic-based puzzles. New puzzles every day, one at each of three skill levels.
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