Maths Olympiad Prep

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Hellenic Mathematical Olympiad

61 problems here, rated 4.9 to 7.7 on our scale (AIME to National Olympiad, round 2). 60 of them ask for a proof.

Algebra 17Combinatorics 11Geometry 16Number theory 17
#TopicDiffTypeYear
1 Geometry 4.9 proof — open
2 Number theory 5.0 proof — open
3 Algebra 5.1 proof — open
4 Algebra 5.1 proof — open
5 Combinatorics 5.1 proof — open
6 Number theory 5.1 proof — open
7 Number theory 5.3 proof — open
8 Combinatorics 5.3 answer — open
9 Algebra 5.4 proof 2020 open
10 Number theory 5.4 proof — open
11 Number theory 5.5 proof — open
12 Number theory 5.6 proof — open
13 Algebra 5.7 proof — open
14 Combinatorics 5.7 proof — open
15 Number theory 5.8 proof — open
16 Geometry 5.8 proof — open
17 Number theory 5.8 proof — open
18 Geometry 5.8 proof — open
19 Number theory 5.8 proof — open
20 Combinatorics 5.9 proof — open
21 Combinatorics 5.9 proof — open
22 Algebra 5.9 proof — open
23 Algebra 6.0 proof — open
24 Algebra 6.0 proof — open
25 Geometry 6.0 proof — open
26 Number theory 6.0 proof — open
27 Algebra 6.0 proof — open
28 Algebra 6.1 proof — open
29 Combinatorics 6.1 proof — open
30 Algebra 6.2 proof — open
31 Number theory 6.2 proof — open
32 Algebra 6.2 proof — open
33 Geometry 6.2 proof — open
34 Number theory 6.3 proof — open
35 Number theory 6.3 proof — open
36 Algebra 6.3 proof 2020 open
37 Number theory 6.3 proof — open
38 Geometry 6.3 proof — open
39 Algebra 6.4 proof — open
40 Geometry 6.5 proof — open
41 Algebra 6.5 proof — open
42 Geometry 6.5 proof — open
43 Geometry 6.6 proof — open
44 Geometry 6.7 proof — open
45 Geometry 6.7 proof — open
46 Number theory 6.7 proof — open
47 Combinatorics 6.7 proof — open
48 Geometry 6.7 proof — open
49 Geometry 6.8 proof — open
50 Number theory 6.9 proof — open
51 Number theory 6.9 proof — open
52 Combinatorics 6.9 proof — open
53 Geometry 7.0 proof 2020 open
54 Geometry 7.0 proof — open
55 Geometry 7.0 proof — open
56 Combinatorics 7.1 proof 2020 open
57 Combinatorics 7.1 proof — open
58 Algebra 7.1 proof — open
59 Combinatorics 7.2 proof 2020 open
60 Algebra 7.5 proof — open
61 Algebra 7.7 proof — 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.