Switzerland — Second Round
10 problems here, rated 5.1 to 7.3 on our scale (AIME, harder to National Olympiad, round 2). 10 of them ask for a proof. Years covered: 2022–2023.
| # | Topic | Diff | Type | Year | |
|---|---|---|---|---|---|
| 1 | Number theory | 5.1 | proof | 2022 | open |
| 2 | Number theory | 5.6 | proof | 2023 | open |
| 3 | Number theory | 5.6 | proof | 2022 | open |
| 4 | Geometry | 5.7 | proof | 2022 | open |
| 5 | Geometry | 5.7 | proof | 2022 | open |
| 6 | Number theory | 6.0 | proof | 2023 | open |
| 7 | Combinatorics | 6.1 | proof | 2022 | open |
| 8 | Combinatorics | 6.7 | proof | 2022 | open |
| 9 | Combinatorics | 7.1 | proof | 2023 | open |
| 10 | Combinatorics | 7.3 | proof | 2023 | 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.