Although it is said that many good things grind, and the number of three is the easiest in the postgraduate mathematics, I can only say that if you have no foundation, the difficulty is still very difficult, because this exam is very complicated (although all the exams are relatively basic). Let's just say you have to work hard day and night. . Mathematical analysis, advanced algebra, ordinary differential equations and probability statistics are the subjects of the number three exam. It is suggested to look at scores and senior generations first (the score textbook of Huazhong Normal University is better than the senior generation textbook of Peking University), and then look at ordinary differential equations and probability statistics.
Of course, the postgraduate entrance examination can be cross-professional, as long as you cross the line drawn by other schools.