So I took the GMAT yesterday and ended up with a 780 (q51v46). I am from a non-english speaking country and have a strong math education.
I studied for a month using the Kaplan book and took one of their online practice tests each week-end. My practice scores were either 750 or 760.
Below are a few comments and recommandation based on my own specific background:
- the questions in the real GMAT felt significantly better worded and polished than in the Kaplan practice tests, where I often found some questions or answers fairly ambiguous in the verbal section
- familiarize with the user interface of the test through online tests, and practice typing with an english layout keyboard if your are not used to those
- with a math background, the quantitative part should be significantly easier, but make sure you know the english name for all math concepts (mode, deviation....)
- if you're good at math, be careful as the toughest questions in the GMAT are usually not about finding the correct answer to a clear question as maths usually are, but more about properly identifying the trick in the question. Pay particular attention to the fact that numbers are integers, positive, consecutive.... It may sound stupid, but I've seen answers that seemed ridiculous at first glance to anyone with a math background, but proved to be correct due to minor restrictions in the question making the answer valid in that particular case
- for the verbal section, once you have understood the key question types, I think the best use of the time of a non-english speaker is to work on sentence correction. There are tangible things to be learned in SC that will be of direct benefit on your score
- during the exam, take all the breaks you can get, walk around, drink a little water and eat something with sugar but not too much. It sounds stupid, but it will make a difference
Hope these comments might prove helpful to some of you !