The International Mathematical Olympiad (IMO) is a six-problem, 42-point math competition held over two days. More than 90 nations compete in this annual event, which is the oldest of the International Science Olympiads. Questions cover a wide range of mathematics. Past IMO questions can be found here.
The U.S. has been represented by a small team of exceptionally talented high school students each year since 1974.
Top scorers of the USA Mathematical Olympiad attend the Mathematical Olympiad Summer Program (MOSP), an intensive training program for exceptional high school students held at the University of Nebraska, Lincoln. The U.S. IMO team is selected during MOSP.
The MAA-produced documentary Hard Problems follows the U.S. team during the 2006 IMO.