The Art of Problem Solving (AoPS) website has an extensive archive of previous tests for AMC 8, AMC 10, AMC 12, AIME, USAMO, and USAJMO. The American Mathematics Competition (AMC) is a series of nation-wide contests for middle school and high school students. The AMC 8 is for students in grade 8 or lower; the AMC 10 is for students in grade 10 or lower; the AMC 12 is for students in grade 12 or lower. Students who score well on the AMC 10 or 12 are invited to take the AIME. And students who score well on the AIME are invited to take the USAMO.
As a student interested in the AMC tests, you may also be interested in the Mathworks summer math programs! We have a two-week Residential Junior Summer Math Camp program for students currently in 6th-8th grades. We also have a six-week Honors Summer Math Camp program for high school students. Apply to the programs through the links below!