Overview

The International Mathematical Olympiad (IMO) is an annual mathematics competition for pre-college students since 1959. In the competition, there are two consecutive days of examinations. An examination in each day consists of three problems with seven points each and lasts for four and a half hour. Basically, there are four main categories in the competition: Algebra, Combinatorics, Geometry, and Number Theory. For more information, click here for the official website. As a former Thailand representative for the competition, I would like to share my techniques and some interesting problems from many competitions around the world in the below links with the following categories.