Maths Olympiad Prep

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Brazilian Math Olympiad

27 problems here, rated 3.8 to 7.3 on our scale (AMC 10/12 to National olympiad, round 2). 26 of them ask for a proof.

Algebra 8Combinatorics 3Geometry 9Number theory 7
#TopicDiffTypeYear
1 Algebra 3.8 answer — open
2 Geometry 4.5 proof — open
3 Geometry 4.5 proof — open
4 Geometry 4.7 proof — open
5 Combinatorics 4.7 proof — open
6 Geometry 4.8 proof — open
7 Geometry 5.0 proof — open
8 Geometry 5.3 proof — open
9 Number theory 5.4 proof — open
10 Geometry 5.6 proof — open
11 Number theory 5.6 proof — open
12 Number theory 5.6 proof — open
13 Algebra 5.6 proof — open
14 Number theory 5.7 proof — open
15 Number theory 6.0 proof — open
16 Number theory 6.2 proof — open
17 Algebra 6.3 proof — open
18 Algebra 6.5 proof — open
19 Algebra 6.7 proof — open
20 Geometry 6.8 proof — open
21 Number theory 6.9 proof — open
22 Combinatorics 6.9 proof — open
23 Geometry 6.9 proof — open
24 Algebra 7.0 proof — open
25 Algebra 7.1 proof — open
26 Combinatorics 7.3 proof — open
27 Algebra 7.3 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.