The registration time of the preliminary contest of the national middle school students' Mathematical Olympiad is mainly concentrated in April and May, and the participating students mainly register in schools.

The National Mathematical Olympiad for Middle School Students is divided into three stages, the first stage is the provincial preliminary contest, the second stage is the provincial rematch, and the third stage is the national final.

Among them, the semi-finals and national finals are not registered separately, and candidates who pass the preliminary round are selected to enter the semi-finals and finals.

China Mathematical Olympics (ChineseMathematical? Olympic Games (CMO for short), the CMO exam is completely simulated by IMO, with 3 questions every day and 4.5 hours in a limited time.

Each question is 21(3 times of IMO questions), and the full score of 6 questions is 126.

The difficulty of the topic is close to IMO, and the award is similar to IMO. Set the first, second and third prizes, and the top 20 to 30 players with the highest scores will form the China National Training Team to participate in the International Mathematical Olympiad that year.

Extended data

Matters needing attention in participating in the national mathematical Olympic competition

1, the national competition must achieve good results in this province, that is, the mathematics competition in this province must go through preliminaries and rematches and enter the provincial team before it can have the opportunity to participate in the national competition.

2. Each team will organize a team with no more than 8 players, including no more than 6 players (students from middle schools or schools at the same level), 1 captain and vice captain. The exam will be held in two days, with 3 questions each, 4.5 hours each and 7 points each.