The first IMO was held in Romania in 1959.

Over 100 countries participate in the IMO each year.

The IMO consists of two 4-hour exams, each with three problems.

Each problem is worth 0-7 points, for a total of 42 points possible.

The top 6 contestants receive gold medals, the next 12 receive silver medals, and the next 18 receive bronze medals.

China has won the most IMO gold medals, with a total of 181.

Grigori Perelman has won the most IMO gold medals, with a total of 6.

The youngest contestant to ever win an IMO gold medal is Terence Tao, who was 13 years old when he won in 1988.

The oldest contestant to ever win an IMO gold medal is Grigori Perelman, who was 23 years old when he won in 1994.

The IMO has been held in the United States once, in 1994.

The IMO trophy is called the IMO Cup.

The IMO headquarters is located in London, England.

The current president of the IMO is not listed in the options.

The website of the IMO is www.imo-official.org.

The IMO's mission statement is to promote the study of mathematics among young people, to encourage international cooperation in mathematics education, and to provide a challenging and rewarding experience for young mathematicians.