- Bradley University Problem of the Week
- Presents problems and solutions, related links, and contact information.
- Dansmath Problem of the Week
- Includes math lessons, author's profile, and contact information. With contest problems.
- IBM Research Ponder This
- Invites match wits with some of the best minds in IBM Research. Includes support and downloads and product information.
- John Handley High School Problem of the Week
- Presents problem of the week, archive, and links. With solutions to last week's problems.
- Ken Duisenberg's Puzzle of the Week
- Shows archive of information. Includes information on how to use standard knight moves and swapping positions.
- Macalester College Problem of the Week
- Shows information about math forums, previous problems, and references. With contact details.
- Math Forum: Discrete Math Problems of the Week
- Information on the math topics to browse, graph theory, patterns, and math fundamentals.
- Math Forum: Geometry Problem of the Week
- Contains calendar of activities, problems, and purchasing information. With policies and terms of use.
- Mathematics Problem Solving Task Centres
- Activities include annual conference, seminar on new approaches to learning, and fractions in the middle years. With contact information.
- Monthly Problem
- Offers a mathemagical party trick to amaze everyone. Includes recent problems with solutions.
- Problem of the Fortnight
- Grants to winners awards including t-shirt, gift certificates, and undying fame and glory. With fortnight problems.
- Problem of the Month
- Announces the list of correct answers in this site. Includes math problems from 2001 to 2004.
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