Vietnamese Mathematical Competitions 2019 with Problems and Solutions Vietnam Mathematical Olympiad 2019 for high school students took place in all cities of Vietnam on 13-14th January, 2019. After that competition, a two-day IMO Team selection test was organized. The top 48 students and one student who got a Silver medal at IMO 2018 took two tests on 29-30th of March, 2019. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education