USA TST
The USA TST, or USA Team Selection Test, is a test administered to the top approximately 30 scorers on the [url=https://web.evanchen.cc/faq-rules.html#CR-1]USA TSTST[/url]. 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.
| USA TST |
| Region: USA |
| Type: Proof |
| Difficulty: 7-9.5 |
| Difficulty Breakdown:
Problem 1/4/7: 7 |
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