It is a test paper type in postgraduate mathematics. Mathematics for postgraduate entrance examination is divided into four categories, namely, Mathematics I, Mathematics II, Mathematics III and Mathematics IV. Short for number one, number two, number three and number four. Their knowledge range, difficulty and emphasis are different. Generally speaking, counting one is more difficult than counting two, counting two is more difficult than counting three, and counting three is more learned than counting four. Basically, science and engineering students take the No.1 exam, economic students take the No.1 and No.2 exams, and management students take the No.3 and No.4 exams. I don't know what kind of exam you want, but there are also graduate students who don't take math exams.