The official GMAT exam assesse the skills most relevant to success in a graduate management program. The GMAT examination is taken by applicants who are seeking admission to a premier MBA institute or B-school. The GMAT is a business school entrance exam that lasts nearly 3 1/2 hours, and includes the following four components:

An analytical writing assessment, which measures critical thinking and communication skills.

An integrated reasoning section, which shows how well students can analyze data and interpret information displayed in varied formats.

A quantitative reasoning section, which determines whether students have strong mathematical abilities and numerical literacy.

A verbal reasoning section, which evaluates reading comprehension skills, editing abilities and whether someone can make sense of written arguments.

Official link:  https://www.mba.com/