5 Downloadable GRE CAT Exams The GRE is only administered on a computer, in a format referred to as the CAT (an acronym for Computer Adaptive Test). The CAT is so named because it adapts to your performance question to question. Our 5 practice GREs use a computer adaptation system, like the real GRE exams. 800score.com tests include: * Quantitative and Verbal GRE practice test sections updated for 2007 with computerized grading and performance analysis. * Practice timed GRE essays. When you finish the essay it will be sent to your email address with explanations and sample essays from other students. * Our proprietary Test Pacer is built into the upper-left corner of our tests. This tells you what question you should be on to finish the test on time and helps you learn the CAT's complicated pacing strategies. * 800score.com's Satisfaction Guarantee. * Free 24-hour tutor support if you have any problems or questions.