90 minutes. The examination time of primary school mathematics in Hefei is 1 60 minutes from grade two and 70-90 minutes from grade three to grade six. Primary school exams are divided into ordinary quizzes and mid-term and final exams. Full score for general quizzes 100 minutes, full score for final exams 100 minutes, and 90- 120 minutes. Chinese subjects generally take a long time, with quizzes about 90 minutes and exams about 120 minutes.