Australian Primary Schools Mathematical Olympiads Inc.
Open to primary schools in Australia, New Zealand and surrounding countries.
IMO and National Olympiads
Information on past and future competitions, competing countries, exam problems and related materials.
IMO and Other Competitions
Past International Mathematical Olympiads and links to web sites related to various regional and national math competitions
International Math Competition for University Students
Information on past and future competitions, contest results and problems. 11th meeting: Skopje, Macedonia; 23--29 July 2004.
Math Olympiad for Elementary Schools
Contest open to all students grade 8 to 4. Offers resources for students and school mathematics clubs.
Mental Calculation World Cup 2004
Mental Calculation World Cup, an international competition for mental calculators
Rocket City Math League
International mail-in competition for avid students in mathematics.
Vojtech Jarnik Mathematical Competition
Held at the University of Ostrava every year in March or April, open to university students. Site includes contest rules, results, and past problems and solutions.