- University of Cambridge - Weekly Challenge Problems - Each link has a problem, further discussion points, and the solution to the problem
- Clay Mathematics Institute - Millennium Problems - 7 problems so far unsolved in Mathematics - prizes awarded for solutions
- University of Northern Colorado - Math Challenge Problems - New problems are posted twice a month - prizes are awarded for first students to submit accurate solutions
- Stanford Math Tournament - Past questions and solutions are at the link. The website also contains information about the tournament including how to join.
- Breakthrough Junior Challenge - Create a 10-minute video explaining a math or science concept and enter to win a $250,000 scholarship (2015 deadline: October 7th)
|