The International Mathematical Olympiad (IMO) is the World Championship Mathematics Competition for high school students and is held in a different country each year.
The IMO has been hosted in the UK only twice previously in its 60 year history; in Glasgow 2002 and London 1979.
Celebrating its diamond anniversary this year, the first IMO was held in 1959 in Romania, with 7 countries participating. The IMO has now expanded to over 100 countries from 5 continents, and the United Kingdom has participated since 1967.
The competition involves teams of up to six contestants sitting two exams on consecutive days. Each exam lasts 4.5 hours and contains three mathematical problems. The exams are marked by a panel of judges and Gold, Silver and Bronze medals are awarded. Those not within the medal boundaries but achieving full marks on at least one problem are awarded an Honourable Mention.