Maths Olympiad Prep

Library /XXXI Brazilian Math Olympiad

XXXI Brazilian Math Olympiad

16 problems here, rated 4.5 to 7.2 on our scale (AIME to National olympiad, round 2). 16 of them ask for a proof.

Algebra 4Combinatorics 6Geometry 4Number theory 2
#TopicDiffTypeYear
1 Geometry 4.5 proof — open
2 Number theory 5.2 proof — open
3 Number theory 5.3 proof — open
4 Algebra 5.4 proof — open
5 Combinatorics 5.5 proof — open
6 Combinatorics 5.5 proof — open
7 Geometry 5.7 proof — open
8 Combinatorics 5.9 proof — open
9 Algebra 6.2 proof — open
10 Algebra 6.2 proof — open
11 Combinatorics 6.2 proof — open
12 Geometry 6.5 proof — open
13 Combinatorics 6.8 proof — open
14 Geometry 6.8 proof — open
15 Algebra 7.0 proof — open
16 Combinatorics 7.2 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.