Rating : - Excellent Preparation Book for the GMAT
It has been seven years since I have been out of college. My math skills are very rusty. The Quanative Review is the best book to get because it is written by the GMAT Staff. Each question comes with an explanation of how the problem is solved. The book is broken down into sections with complete explanations.

I am not good at math at all and there are over 300 problems to solve from basic arthimatic, algebra, geometry, and Data Sufficienty. all have multiple choice answers and at the end of each section.

The book is much cheaper than getting it through the mba.

I also recommend the GMAT Verbal Review as well