American Mathematics Olympiad (AMO)
Open to all eligible students
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International Youth Math Challenge (IYMC)
First-round submission in Nov - Dec
International Teenagers’ Mathematics Olympiad (ITYM)
Open to all eligible students
SEAMO-X
Only for invitees from SEAMO winners
Southeast Asian Mathematical Olympiad (SEAMO)
Open to all eligible students
Singapore and Asian Schools Math Olympiad (SASMO)
Open to all eligible students
Purple Comet! Math Meet
Team-based, open to all eligible teams