Postgraduate entrance examination 330 is a math problem book. According to the relevant information, 330 questions is a big exercise book, which can deal with all the questions in the postgraduate mathematics. "330" is a new book published this year by teachers Li Yongle, Wang Shian and Wu Zhongxiang. It is divided into three parts: No.1, No.2 and No.3. Each book has 330 questions.