Where there was one, there now is two. For over half a century, students took the GMAT as part of the application process for business school, but today there's a choice. Business schools, including many top-ranked programs, now accept the Graduate Record Examination, or GRE, in lieu of the GMAT. This super-charged SAT tests the same skills as the GMAT -- verbal and quantitative reasoning -- yet its format and test sections differ significantly, possibly to some testers' advantage.
Testers whose verbal abilities outweigh their quantitative skills often score higher on the GRE than on the GMAT. While both exams only cover high school level math concepts, the GMAT's math problems are more demanding and complex since math is a critical component of business education and practice. The GRE, on the other hand, is the entrance exam for a wide range of graduate programs, including many in which math is never used, so questions are generally less complicated.