I suggest you do real questions for at least 20 years. This is because mathematics for postgraduate entrance examination is different from English for postgraduate entrance examination and politics for postgraduate entrance examination. English and politics have a strong sense of the times and strong timeliness. For example, you are doing a real question about English and politics 10 years ago, which is completely different from the real question now.

Introduction to postgraduate entrance examination:

The National Unified Entrance Examination for Postgraduates (hereinafter referred to as "Postgraduate Entrance Examination" or "Unified Examination") refers to the general name of the relevant examinations organized by the education authorities and enrollment institutions for the selection of postgraduates, and consists of the initial examination and re-examination organized by the national examination authorities and enrollment units. It is a selective examination, and the type of academic qualifications admitted is general higher education.

Postgraduate enrollment in general higher education is divided into academic master and professional master according to degree types; According to the form of study, it is divided into full-time graduate students and part-time graduate students, all of whom use the same examination subjects and the same score line for selection and admission.