Library /China National Olympiad

China National Olympiad

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

Algebra 12Combinatorics 10Geometry 6Number theory 9

#	Topic	Diff	Type	Year
1	Number theory	5.9	answer	—	open
2	Combinatorics	6.0	answer	—	open
3	Number theory	6.2	answer	—	open
4	Combinatorics	6.2	answer	—	open
5	Number theory	6.2	answer	—	open
6	Algebra	6.2	answer	—	open
7	Geometry	6.3	answer	—	open
8	Geometry	6.3	answer	—	open
9	Geometry	6.4	answer	—	open
10	Combinatorics	6.4	answer	—	open
11	Number theory	6.5	answer	—	open
12	Combinatorics	6.5	answer	—	open
13	Combinatorics	6.5	answer	—	open
14	Number theory	6.5	answer	—	open
15	Combinatorics	6.6	answer	—	open
16	Combinatorics	6.6	answer	—	open
17	Algebra	6.7	answer	—	open
18	Combinatorics	6.8	answer	—	open
19	Number theory	6.8	answer	—	open
20	Number theory	6.8	answer	—	open
21	Geometry	6.9	answer	—	open
22	Algebra	6.9	answer	—	open
23	Algebra	6.9	answer	—	open
24	Algebra	7.0	answer	—	open
25	Algebra	7.0	answer	—	open
26	Algebra	7.1	answer	—	open
27	Algebra	7.1	answer	—	open
28	Algebra	7.1	answer	—	open
29	Geometry	7.1	answer	—	open
30	Algebra	7.2	answer	—	open
31	Number theory	7.2	answer	—	open
32	Combinatorics	7.2	answer	—	open
33	Algebra	7.3	answer	—	open
34	Number theory	7.3	answer	—	open
35	Geometry	7.3	answer	—	open
36	Combinatorics	7.4	answer	—	open
37	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.