TOKYO, July 13 (Xinhua) -- Chinese students won six gold medals at the 64th International Mathematical Olympiad (IMO) in Chiba, Japan, which ended on Wednesday, bagging a team gold medal for the fifth consecutive year with a total of 240 points.
According to IMO rules, no more than six students from each country or region can participate in the annual competition, and the contestants must solve six problems within two consecutive days, with each problem worth 7 points, making 42 points the maximum possible score.
