http://sat.collegeboard.com/practice/

The SAT Reasoning Test (formerly Scholastic Aptitude Test and Scholastic Assessment Test) is a standardized test for college admissions in the United States. The SAT is owned, published, and developed by the College Board, a non-profit organization in the United States. It was formerly developed, published, and scored by the Educational Testing Service^[1] which still administers the exam. The College Board claims the test can assess a student's readiness for college. The test was first introduced in 1901, and its name and scoring have changed several times.

The current SAT Reasoning Test, introduced in 2005, takes three hours and forty-five minutes, and costs $45 ($71 International), excluding late fees.^[2] Possible scores range from 600 to 2400, combining test results from three 800-point sections (math, critical reading, and writing).

more information please see:

http://en.wikipedia.org/wiki/SAT