1. Different disciplines: non-mathematical category A mainly involves natural science, chemistry, etc. The study of natural phenomena and laws, rather than mathematics, mainly involves social sciences, economics, psychology, etc. To study the phenomena and laws of human society.

2. Different research methods: Non-mathematical Class A mainly depends on the application of mathematical tools and methods, calculus, linear algebra, etc. , rather than mathematics B, the application of mathematics is relatively indirect, and it pays more attention to the collection, collation and analysis of data, thus revealing the essence and laws of social phenomena.

3. Competition classification is different: in the national college students' mathematics competition, non-mathematics category A is a science and engineering discipline, which mainly examines advanced mathematics, linear algebra and other mathematics-related knowledge points, with relatively high difficulty, while non-mathematics category B is an economics, management, literature and history discipline, which is only related to economics and management knowledge, with relatively low test difficulty.