Official Problem Set
Available November 17, 2026
Not yet releasedArchive
Problems
Every official paper and solution set will remain publicly available here after its competition window closes.
2026
Edition 01 · upcoming
Solutions
Available November 17, 2026
Not yet releasedBefore contest day
Sample problems
Samples are illustrative practice, not official 2026 competition problems.
A student draws three distinct diagonals of a regular octagon, choosing each diagonal so that all three pass through the center. How many different sets of three diagonals are possible?