GMAT is a computer adaptive test intended to assess certain analytical, writing, quantitative, verbal, and reading skills in written English for use in admission to a graduate management program, such as an MBA program. According to the test-owning company, the GMAT assesses analytical writing and problem-solving abilities, while also addressing data sufficiency, logic, and critical reasoning skills that it believes to be vital to real-world business and management success. It can be taken up to five times a year but no more than eight times total. 

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LSAT is a half-day standardized test administered seven times each year at designated testing centers throughout the world. The Law School Admission Council (LSAC) administers the LSAT for prospective law school candidates. It is designed to assess reading comprehension as well as logical and verbal reasoning proficiency. The test is an integral part of the law school admission process in the United States, Canada (common law programs only), the University of Melbourne, Australia, and a growing number of other countries.

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GRE is a standardized test that is an admissions requirement for many graduate schools in the United States and Canada and few in other countries. The GRE is owned and administered by Educational Testing Service (ETS). The test was established in 1936 by the Carnegie Foundation for the Advancement of Teaching.

According to ETS, the GRE aims to measure verbal reasoning, quantitative reasoning, analytical writing, and critical thinking skills that have been acquired over a long period of learning.