High Quality Content by WIKIPEDIA articles! The GRE subject test in mathematics is a standardized test created by the Educational Testing Service, and is designed to assess a candidate's potential for graduate or post-graduate study in the field of mathematics. It contains questions from many fields of mathematics. About 50% of the questions are on calculus (including multivariate calculus), 25% on linear algebra, and 25% on a broad variety of other topics typically encountered in undergraduate mathematics, such as abstract algebra, point-set topology, elementary number theory, probability and statistics, as well as real and complex analysis.