The USA TST, or USA Team Selection Test, is a test administered to the top approximately 30 scorers on the USA TSTST. The results are used to determine the team that is sent to the IMO (although it is not the sole determining factor). Nowadays, it consists of 6 problems over 2 days, like the USAMO. The questions (especially since 2015) are noticeably harder than corresponding problems on the USAMO.

Region: USA
Type: Proof
Difficulty: 7-9.5
Difficulty Breakdown:

Problem 1/4/7: 7
Problem 2/5/8: 8
Problem 3/6/9: 9.5

This article is a stub. Help us out by expanding it.