Hi!
I'm also preparing for my GMAT. I've started studying end of June and now it's only two weeks away!
Need your advice on how to improve quant in two weeks' time.
I've studied OG, Kaplan and Princeton. Unfortunately, I haven't studied Manhattan as the books are not available in my country. I did study the Manhattan flashcards though.
I've been getting 38-47 in my practice exams (GMAT prep, 800score). I don't understand why my performance fluctuates so much

sometimes I feel that I've gotten the hang of it, but most times I feel so depressed and frustrated with quant.
Verbal has been better for me. I've started with 38 but progressed to 40-41 level. I feel I can improve this more since I've studied Manhattan SC the past week and 90% of my mistakes are in SC.
Any advice guys? I really want to get 680 minimum..
Thanks so much!