Students aspiring to obtain a graduate degree from a University in America need to take this test. About 300 to 500 graduate programs across 3500 Universities in the United States of America use GRE scores. The GRE tests the general abilities in Mathematics and English that a grad school aspirant should have. The GRE does not measure subjective factors important to academic and career success — such as motivation, creativity, interpersonal skills, study skills, or overall success on the job.