(VOVworld) – Fifteen pupils from the Hanoi-Amsterdam High School for the Gifted attending the 2013 Bulgaria International Mathematics Competition (BIMC) won three gold medals to finish second in the event for 5th-7th grade pupils. At a reception for the pupils, Vietnamese Ambassador to Bulgaria, Le Duc Luu, praised them for their good performance. The 2013 competition for students in grades 5 to 10 attracted more than 1,000 pupils from 31 countries around the globe. The next event will be held in the Republic of Korea in 2014.