Hi alextaylor116,
We discussed some of the details of your situation about 2.5 months ago here:
how-much-do-gmat-scores-vary-test-to-test-and-how-accurate-is-veritas-216019.html#p1668191GMAC has publicly stated that the Official Score that you earn on Test Day is within +/-30 points of actual ability. Assuming a similar 'swing' in how your CATs function, your CAT score results show that you're relatively close to your goals. Your CAT scores are all clustered around the high-600s, so it's likely that your current ability level is right around 670 +/- a few points. You mentioned that you have been focusing on 'difficult' questions, but that clearly is NOT what you need right now. Those difficult questions do not represent the missing points that you're looking for. Instead, you should be defining WHY you're getting questions wrong so that you can fix whatever little mistakes you're making.
On this last CAT, how many questions did you get wrong...
1) Because of a silly/little mistake? Be honest with this assessment - how many of those wrong answers were actually on 'gettable' questions?
2) Because there was some math/verbal that you just didn't know how to do?
3) Because the question was too hard?
GMAT assassins aren't born, they're made,
Rich