Math Olympiads for Elementary and Middle Schools – Math contests for aspiring students from grades 4-8 that involves working in teams to solve challenging problems.
USAMTS – A proof-based math competition for high school students equivalent to the AMC 10/AMC 12. Students who perform well on this home exam may qualify for the AIME and USA(J)MO. The test has multiple rounds and students are given a whole month to work out their solutions.
International Math Olympiad – The premier math competition for high school students across the world. Qualification for this competition is competitive and rigorous and involves taking the AMC 10/12, then the AIME, then the USAMO for those in the US.
2021 International Math Contest – This contest is available for students across the world in grade 3 to grade 10. The contest lasts for 30 minutes and it is held online. The math questions are based on a national curricula and is developed by math professionals. If you are one of the qualifiers, you’ll be invited to the Russian Math Olympiad!
International Mathematics Competition (IMC) – The Chiu Chang Mathematics Education Foundation in China established the IMC in the early 2000s and it has grown into a multi-continental competition. The competition is directed towards Southeast Asia but is open to any country. Each country or city that is invited will send 2 teams (6 members per team) of promising individuals to compete in the competition. Host countries–including Bulgaria, China, Hong Kong, India, Indonesia, Macau, Malaysia, Nepal, Philippines, South Africa, South Korea and Thailand–are permitted to send 4 teams to the event.