48th International Mathematical Olympiad Vietnam Shortlisted Problems with Solutions
21 problems here, rated 7.6 to 9.1 on our scale (National olympiad, round 2 to IMO level). 21 of them ask for a proof.
| # | Topic | Diff | Type | Year | |
|---|---|---|---|---|---|
| 1 | Number theory | 7.6 | proof | 2007 | open |
| 2 | Number theory | 7.7 | proof | 2007 | open |
| 3 | Algebra | 7.8 | proof | 2007 | open |
| 4 | Combinatorics | 8.0 | proof | 2007 | open |
| 5 | Algebra | 8.0 | proof | 2007 | open |
| 6 | Number theory | 8.1 | proof | 2007 | open |
| 7 | Geometry | 8.1 | proof | 2007 | open |
| 8 | Geometry | 8.2 | proof | 2007 | open |
| 9 | Algebra | 8.3 | proof | 2007 | open |
| 10 | Geometry | 8.4 | proof | 2007 | open |
| 11 | Geometry | 8.4 | proof | 2007 | open |
| 12 | Algebra | 8.4 | proof | 2007 | open |
| 13 | Combinatorics | 8.5 | proof | 2007 | open |
| 14 | Algebra | 8.6 | proof | 2007 | open |
| 15 | Combinatorics | 8.7 | proof | 2007 | open |
| 16 | Geometry | 8.7 | proof | 2007 | open |
| 17 | Geometry | 8.8 | proof | 2007 | open |
| 18 | Number theory | 8.9 | proof | 2007 | open |
| 19 | Algebra | 8.9 | proof | 2007 | open |
| 20 | Combinatorics | 9.1 | proof | 2007 | open |
| 21 | Combinatorics | 9.1 | proof | 2007 | open |
These are in difficulty order within this competition, but they are not a course.
The track is the ordered route, drawn from across all the sources.