Indonesia Mathematical Olympiad

The Indonesia Mathematical Olympiad (also known as the Olimpiade Sains Nasional) is the last of a series of three tests in Indonesia. This test is used in the selection process for Indonesia’s IMO team. It is also part of the Indonesia National Science Olympiad, and has been running since 2002.

Indonesia MO
Region: Indonesia
Type: Proof
Difficulty: 3.5 - 6
Difficulty Breakdown:

Problem 1/5: 3.5
Problem 2/6: 4.5
Problem 3/7: 5
Problem 4/8: 6


The Indonesia MO has a total of eight problems to be solved over two days. Each day has 240 minutes (4 hours) to solve four problems, and each problem is worth 7 points. Like most Olympiads, complete solutions are required for full credit. No calculators, no protractors, and no triangle-shaped rulers are allowed.