Hi henrique1206,
A 690 is an outstanding initial CAT score (the Average Score on the Official GMAT hovers around 550 most years). Assuming that you took this CAT/mock in a realistic fashion (for example, you didn't see any questions that you already knew the answers to and you didn't do anything that you are not allowed to do on the Official GMAT, such as pause the Test), then you are likely a really strong overall critical-thinker. The scoring algorithm on the Official GMAT is far more complicated than most people realize - and it takes into account more than just the number of correct and incorrect answers.
Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on your timeline and your goals:
1) What study materials do you currently have access to?
2) What is your overall goal score?
3) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich
Contact Rich at: [email protected]