The first Vietnamese Math Olympiad was held in 1962, and since then it has been held every year except 1973. Nowadays it is divided in categories A and B, where A is the more difficult.
Vietnam at International Competitions
Vietnam has participated at IMO since 1974. The best result of their team on an IMO was the 3-rd place in 2007. The team is selected through the National Olympiad (final round held in March) and the Selection Exam (held in May), where only A category is eligible.