The International Mathematical Olympiad (IMO) is the World Championship Mathematics Competition for High School students. It is held annually, each time in a different country. The first IMO was held in 1959 in Romania, with 7 countries participating.
It has gradually expanded to over 100 countries from 5 continents. In 2017, the 58th IMO was held in Rio de Janeiro, Brazil and the 59th IMO in 2018 in Romania again.
The 2019 IMO was held in Bath, United Kingdom, from 11 to 22 July. The 2020 IMO will
be held in St Petersburg, Russia, from 8 to 18 July.
In South Africa, the South African Mathematics Olympiad is the biggest Olympiad in the country. Almost 100 000 learners participated in the 2017 Olympiad. The first
round is written in March. The junior division consists of separate papers for Grades 8 and 9 and the senior division of one paper for Grades 10 to 12.
There is also the South African Mathematics Challenge for learners in Grades
4 to 7. More than 110 000 learners from over 500 schools around the country take part in the Challenge.