Hi sguraba,

I'd like to know a bit more about how you've been studying overall:

1) How long have you been studying?
2) Are you using any resources besides the MGMAT books you mentioned?

3) What is your goal score?
4) When are you planning to take the GMAT?

There are LOTS of different resources that you could be using during your studies, so it's possible that the ultimate solution to your situation is to invest in something new.

GMAT assassins aren't born, they're made,
Rich

Rich's post clearly did nothing to answer your question. Next time, you can post directly to the Mprep forum on here.

We've reorganized our strategy guides from the 4th edition to the 6th, so we no longer have the "advanced" sections. We felt that calling certain concepts "advanced" led to some confusion - some students felt that they could skip those chapters, or worse, other students felt that they could skip directly to those chapters! So, we've now divided our strategy guides into content, strategies, and extras.

I would still recommend picking up a copy of the 6th ed. Number Properties, as we've moved certain chapters to that guide that used to be in other guides.

Good luck with your studies!