Math, one, two, three. On-the-job postgraduate is a type of postgraduate education in the national plan, which is part-time and part-time study in school as an on-the-job person. According to the national regulations, when the major to apply for is management, you must rely on mathematics one, two and three. Mathematics is a discipline that studies the concepts of quantity, structure, change, space and information, and belongs to a formal science from a certain point of view.