The short answer: a lot.
Students come to me all the time because they took the GMAT and didn't get the score that they wanted. And in 9 times out of 10, the problem is that the student hadn't studied enough.
I studied for about 80 hours and got a 770. However, data says that people who get above a 700 study 120+ hours ON AVERAGE. This means that many students study a great deal more than 120 hours to get their dream score.
One of our tutors told me that she studied for four hours per day for five months! All said and done, she studied for about 500 hours to receive a 50+ score on the math section.
Many people claim that aptitude tests like the GMAT don't test intelligence, but there's one thing that's for sure. The GMAT definitely tests your persistence and time management skills as you struggle to put in 120+ hours on top of a full-time job and whatever else you're doing. As you're studying, remember that the GMAT is simply testing your ability to achieve results, no matter what your starting point. As a manager, you'll be asked to do things that you've never done before. You'll need to learn skills outside of work to make sure that the job not only gets done, but gets done well. Would you be able to manage your time to ensure that the project achieves its desired results?
If so, you're going to kick ass on the GMAT!
For a free hour of tutoring, message us at firstname.lastname@example.org
Based in Seattle, WA.