The GRE is a test conducted by the Educational Testing Service and is a requirement for admission to graduate and professional schools in the US and Canada which includes business and law programmes. This test has three different sections to it: quantitative reasoning, verbal reasoning and analytical writing.
There are different GRE tests available. GRE General, which needs to be taken for admissions to business schools and another GRE subject-based test which includes subjects like physics, chemistry, biology, psychology. The test format for both these is the same. The GRE can be taken as a computer-based test or a paper-based test. In the case of the computer-based test, the sequence of the three parts may vary from candidate to candidate.