7 1.87。 Postgraduate entrance examination mathematics, postgraduate entrance examination subjects, according to the different requirements of various disciplines and majors on the mathematical knowledge and ability that postgraduate entrance examination should possess, there are three kinds of postgraduate entrance examination mathematics papers, and the types of papers used by different majors have specific provisions. Mathematics 1 65.69, the difficulty coefficient is 0.438, which is too difficult. Mathematics 2 is 7 1.87, with a difficulty coefficient of 0.479, which is slightly higher. Math III is 76.80, with a difficulty coefficient of 0.5 12, and the difficulty is moderate.