Maths Olympiad Prep

Library /China National Olympiad

China National Olympiad

33 problems here, rated 5.9 to 7.9 on our scale (AIME, harder to National Olympiad, round 2).

Algebra 11Combinatorics 9Geometry 6Number theory 7
#TopicDiffTypeYear
1 Number theory 5.9 answer — open
2 Combinatorics 6.0 answer — open
3 Number theory 6.2 answer — open
4 Number theory 6.2 answer — open
5 Algebra 6.2 answer — open
6 Geometry 6.3 answer — open
7 Geometry 6.3 answer — open
8 Geometry 6.4 answer — open
9 Combinatorics 6.4 answer — open
10 Combinatorics 6.5 answer — open
11 Combinatorics 6.5 answer — open
12 Number theory 6.5 answer — open
13 Combinatorics 6.6 answer — open
14 Combinatorics 6.6 answer — open
15 Algebra 6.7 answer — open
16 Combinatorics 6.8 answer — open
17 Number theory 6.8 answer — open
18 Geometry 6.9 answer — open
19 Algebra 6.9 answer — open
20 Algebra 6.9 answer — open
21 Algebra 7.0 answer — open
22 Algebra 7.0 answer — open
23 Algebra 7.1 answer — open
24 Algebra 7.1 answer — open
25 Geometry 7.1 answer — open
26 Algebra 7.2 answer — open
27 Number theory 7.2 answer — open
28 Combinatorics 7.2 answer — open
29 Algebra 7.3 answer — open
30 Number theory 7.3 answer — open
31 Geometry 7.3 answer — open
32 Combinatorics 7.4 answer — open
33 Algebra 7.9 answer — 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.