The mathematics competition focuses on examining students' logical thinking ability and problem-solving ability, and is divided into primary school group, junior high school group and high school group. The competition is a closed-volume written examination, with an examination time of 90 minutes for the elementary school group and 120 minutes for the junior and senior high school groups. The question type includes three parts: multiple choice questions, blank filling questions, and answer questions. Select 10 questions, 4 points per question, a total of 40 points; fill in 8 questions, 5 points per question, a total of 40 points; answer 4 questions, 20 points per question, a total of 80 points, a total of 160 points. Answering the questions requires writing out detailed steps for solving the questions, and giving points according to the steps. Only the answers have no process to be divided. Straight rulers, compasses, and triangles are allowed, but calculators and electronics are prohibited. You can submit your paper 30 minutes before the end of the exam, and you cannot re-enter after submitting your paper.