Study guides for each are available on the web pages listed below and at many bookstores. Where GREs are required, students usually take the general exam, while the other two are often optional. The general test is divided into three sections to evaluate verbal, analytical and quantitative aptitude.
Subject tests evaluate knowledge in a specific field and are currently administered in twelve areas.
GRE scores are reported for 5 years, but your percentile rank may change after 3 years. Like the GRE general exam, the GMAT is divided into three sections to test verbal, analytical and quantitative aptitude. GMAT scores are reported for 5 years. LSAT scores are reported for 5 years. The exam is divided into four parts, testing knowledge of basic biological sciences, physical sciences and verbal reasoning, with a section devoted to expository writing.