I just wrote the GMAT after studying for 2 months and I'm not too happy with my 640. Verbal is not the problem, throughout my practise tests I was getting anywhere between 85-95 percentile. Quant is definitely where I struggle and I found the actual GMAT contained harder Quant questions, as I was scoring around the 70th percentile in practise tests. I feel like I can easily score 700+ if I improve my Quant score.

Does anyone have recommendations on study guides (or just strategies in general) that are particularly good for Quant. Numbers Properties, Probability and Combinatorics are my weaknesses, and I am fairly strong in Geometry and Algebra.

My study material:

OG 13th Edition

Kaplan Premier 2012-13

Kaplan Math WorkbookPractise Tests:

Kaplan - 6 online CATs

Manhattan - 6 online CATs

GMAT Prep Software - 2 CATs

I also took a 1-weekend course with Oxford Seminars

Thanks!