GMAT(Graduate Management Admission Test), a standardized test required by the vast majority of business schools because it provides a measure of an applicant's academic ability.
It is a standardized test intended to measure a test taker's aptitude in mathematics and the English language. The GMAT is most commonly used as the primary exam reviewed by business schools to gain entrance into an MBA program. The exam is generally offered by computer only; in areas of the world where computer networks are limited, the exam may be given as a paper-based test.
Graduate Management Admission Test - GMAT exam consists of three sections: analytical writing assessment, verbal ability and a quantitative section. The maximum score achievable for the GMAT is 800, and exam scores are generally valid for five years following the exam's completion.

Graduate Management Admission Test
Administered by 
GMAC (Graduate Management Admission Council)
Website:
www.gmac.com, or www.mba.com
Validity:
The score is generally valid for 5 years