Math 3 is an exam for students who apply for economics. The contents of the examination are advanced mathematics, linear algebra and probability statistics. The high number part mainly focuses on the investigation of calculus, and there is no hypothesis test and confidence interval in probability statistics. Mathematics 1: it is a science and engineering class, which requires high mathematics; Math 3: for management, economy, etc. The number one exam is comprehensive, including high number, line generation and introduction, and the topic is difficult to calculate. The difficulty of the topic is not much simpler than that of the top scholar exam. The number one topic involves a wide range, and sometimes it requires thinking in images, and the difficulty is not low. Although the outline of the number three is less than the number one, the topic is very detailed and the difficulty is not as simple as imagined.