International Mathematical Olympiad China National Team Selection Test
11 problems here, rated 8.3 to 9.1 on our scale (Shortlist to IMO level). 11 of them ask for a proof.
| # | Topic | Diff | Type | Year | |
|---|---|---|---|---|---|
| 1 | Combinatorics | 8.3 | proof | 2025 | open |
| 2 | Algebra | 8.4 | proof | 2025 | open |
| 3 | Geometry | 8.6 | proof | 2025 | open |
| 4 | Combinatorics | 8.7 | proof | 2025 | open |
| 5 | Algebra | 8.7 | proof | 2025 | open |
| 6 | Algebra | 8.7 | proof | 2025 | open |
| 7 | Number theory | 8.8 | proof | 2025 | open |
| 8 | Geometry | 8.9 | proof | 2025 | open |
| 9 | Combinatorics | 8.9 | proof | 2025 | open |
| 10 | Geometry | 9.0 | proof | 2025 | open |
| 11 | Algebra | 9.1 | proof | 2025 | open |
These are sorted by difficulty within the competition, but they aren't a course.
The track is the route through, drawn from all the sources at once.