Contest problem archive
Get better at math contests, one problem at a time
Contest Nexus helps you find practice questions, check your answers, and see what you have already solved. Start with a topic, review past contest problems, or try a full contest when you want a challenge.
Contest info
Choose what to practice with more context
The contest guide explains grade levels, usual dates, formats, qualification paths, fees, awards, and difficulty so you can pick the right archive before searching.