1. Multiple choice question: This question mainly examines students' basic knowledge and skills, including the basic concepts, principles and methods of mathematics. When solving problems, we should pay attention to the examination of questions, understand the requirements of questions, and then use relevant knowledge and methods to answer them.

2. Fill-in-the-blank question: This question mainly examines students' calculation ability and memory ability of mathematical formulas. When solving problems, we should pay attention to the examination of questions, understand the requirements of questions, and then use relevant formulas to calculate according to the conditions and requirements given by questions.

3. Answer: This question mainly examines students' comprehensive application ability and problem-solving ability. When solving problems, we should pay attention to the examination of questions, understand the requirements of questions, and then use relevant knowledge and methods to answer according to the conditions and requirements given by questions.

4. Proof question: This question mainly examines students' proof ability. When solving problems, we should pay attention to the examination of questions, understand the requirements of questions, and then use relevant knowledge and methods to prove them according to the conditions and requirements given by questions.

5. Analysis question: This question mainly examines students' ability to analyze and solve problems. When solving problems, we should pay attention to the examination of questions, understand the requirements of questions, and then use relevant knowledge and methods to analyze and answer according to the conditions and requirements given by questions.

6. Design question: This question mainly examines students' innovative thinking and problem-solving ability. When solving problems, we should pay attention to the examination of questions, understand the requirements of questions, and then use relevant knowledge and methods to design and solve them according to the conditions and requirements given by questions.

When summing up the math problems in the postgraduate entrance examination, we can sum up the characteristics of the questions, the methods of solving problems, common mistakes and so on. At the same time, you can also improve your problem-solving ability by doing real and simulated questions over the years.