GMAT Practice Tests
This site provides you free GMAT practice tests including GMAT math(quantitative) practice tests, essay (argument analysis) practice tests and verbal questions practice tests:
GMAT Quantitative Section Simulation Test(37 questions, 75 minutes)
GMAT Verbal Section Simulation Test(41 questions, 75 minutes)
GMAT Reading Comprehension Practice Test (4 passages, 12 questions, 22 minutes)
GMAT Sentence Correction Practice Test (12 questions, 22 minutes)