139 The number of questions in the question bank is uncertain, and the question bank will be updated, so there is no accurate answer. 139 high marks must be brushed in the exercise library, which is a high mathematics exercise book. Higher mathematics refers to a more complicated part of mathematical objects and methods compared with elementary mathematics and secondary mathematics. Algebra, geometry and simple set theory in middle schools are called secondary mathematics, which is regarded as the transition between elementary mathematics in primary and secondary schools and advanced mathematics in universities. It is generally believed that advanced mathematics is a basic subject formed by calculus, algebra, geometry and their intersection. The main contents include series, limit, calculus, spatial analytic geometry and linear algebra, series and ordinary differential equations. It is a basic subject for postgraduate examinations in engineering, science and engineering and finance.