Mathematics for postgraduate entrance examination is moderately difficult. According to the query of this year's Graduate Network, I have read all three math questions of 20 16 for postgraduate entrance examination, which belong to basic questions, slightly improved, and 2 1 points belong to difficult problems or partial problems. The mathematics of 20 16 is more difficult than that of 20 15, and the difficulty coefficient of 20 14 is basically the same. Among them, the difficulty coefficient of No.1 is high, the difficulty coefficient of No.2 is particularly high, and the difficulty coefficient of No.3 is medium.