The medallists include Le Thi Hong Phuong from the Hanoi-Amsterdam High School and Duong Thi Thu Phuong from the Hanoi National University’s High School.

Two other students from the Hanoi National University’s High School, Le Hoang Bich Nga and Pham Anh Duc, won consolation prizes.

The 18th IBO drew the participation of students from 60 countries and territories worldwide.