The differences of ab in mathematics competition specialty are: different difficulty, different emphasis and different uses.

First, the difficulty is different.

1, Mathematics Competition Major A: Mathematics Competition Major A is more difficult, aiming at students in inland cities with rich teaching resources.

2. Math Competition Major B: Math Competition Major B is less difficult, and it faces students from marginal cities with weak teaching resources.

Second, the emphasis is different.

1, Mathematics Competition Major A: Mathematics Competition Major A focuses on the investigation of thinking.

2. Mathematics Competition Major B: Mathematics Competition Major B focuses on the investigation of computing ability.

Third, the use is different.

1, Mathematics Competition Major A: Zhejiang, Jiangsu, Hebei, Hunan, Hubei, Beijing, Shanghai, Guangdong and other provinces use Volume A.

2. Math Competition Major B: Use Volume B in Inner Mongolia, Guizhou, Ningxia, Xinjiang and other ethnic minority areas.