Science Math Recreations Games_and_Puzzles Problem_of_the_Week Science Math Recreations Games_and_Puzzles Problem_of_the

Bradley University Problem of the Week - Weekly math problem and archive from Professor Alberto L. Delgado.
Columbus State University - Problem of the Week Contest - A weekly contest for all students from elementary to high school. Prizes awarded each month.
Dansmath Problem of the Week - Weekly math problem, with solutions, archive, and leader board.
IBM Research Ponder This - A monthly on-line competition hosted by researchers at IBM.
John Handley High School Problem of the Week - Weekly math problem with solutions and archive.
Ken Duisenberg's Puzzle of the Week - Problem archive and puzzle links.
Macalester College Problem of the Week - Weekly math problem and archive from Professor Stan Wagon for first-year college students presented by the Math Forum.
Math Forum: Algebra Problem of the Week - Past archive and solutions. Receive help from a mentor. Paid membership required to view problems.
Math Forum: Discrete Math Problems of the Week - Past problems and solutions, student recognition. Paid membership required to view problems.
Math Forum: Geometry Problem of the Week - Past archive and solutions. Receive help from mentor. Paid membership required to view problems.
Math Forum: Math Fundamentals Problem of the Week - A weekly interactive project for elementary school mathematics. Past problems, solutions, and student recognition. Paid membership required to view problems.
Math Forum: Problems of the Week - Projects from the Math Forum presenting weekly interactive math challenges to accumulate points for bronze, silver and gold prizes. Individual or class participation. Paid membership required to view problems.
Math Magic - Devoted to original mathematical recreations with puzzles and links.
Mathematics Problem Solving Task Centres - Designed to assist teachers and students in problem solving. Includes problem of the month. Paid membership is required to view archived problems.
Monthly Problem - Math problems and solutions from Math Central.
Problem of the Fortnight - Twice-monthly problems with archive and solutions.
Problem of the Month - Posted by the Mathematics Department of Bilkent University.
Purdue University Problem of the Week - Weekly math challenge with past problem archives and solutions.
PuzzleUp - Weekly math problem with archive and scoreboard.
Stony Brook Problem of the Month - Monthly math challenge with past problem archives and solutions, and hall of fame.
Trent University Problem of the Week - Weekly math problems and solutions from Trent University.

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