The difference in difficulty between the first, second and third grades of mathematics for postgraduate entrance examination is: different subjects, different examination subjects and different border inspection points.

First, for different objects.

1, Postgraduate Mathematics I: The object of Postgraduate Mathematics I is engineering.

2. Postgraduate Mathematics II: The object of Postgraduate Mathematics II is engineering.

3. Postgraduate Mathematics III: Postgraduate Mathematics III is aimed at economic management.

Second, the examination subjects are different.

1, Postgraduate Mathematics I: The examination subjects of Postgraduate Mathematics I are advanced mathematics, linear algebra, probability theory and mathematical statistics.

2. Postgraduate Mathematics II: The examination subjects of Postgraduate Mathematics II are advanced mathematics and linear algebra.

3. Postgraduate Mathematics III: The examination subjects of Postgraduate Mathematics III are calculus, linear algebra, probability theory and mathematical statistics.

Third, the focus of border inspection is different.

1, Postgraduate Mathematics I: The focus of the side check of Postgraduate Mathematics I is the amount of calculation and the complexity of operation.

2. Postgraduate Mathematics II: The focus of the side inspection of Postgraduate Mathematics II is the calculation idea and complexity.

3. Postgraduate Mathematics III: The focus of the side check of Postgraduate Mathematics III is the calculation ideas and methods.