I used Kaplan and Barron's but problems in GMAT test were way too hard than book.
Kaplan's math questions are more difficult than the real test.\n\nIf you are interested in practice questions then ETS's GMAT Review (11th Edition) is the best book available. All the questions in it have been used in real GMAT tests and so they are definitely like the real thing. You should be able to get hold of it from Amazon, MBA.com or your local bookshop.\n\nIf you are interested in tutorials and tips then check out PrepForTests online GMAT quantitative tutorials http://www.prepfortests.com/gmat/tutorials/quantitative
Physics -Graduate School - students - programs - advice - resources Graduate Students  \nOffers advice and studying tips for the Physics GRE. Guide to ... Getting into the Best Grad School- Prepa...Colleges and Universities in the USA - G...gradschool.about.com/od/physics \nPhysics & Astronomy|Academics| Millikin University  \nStudying physics will train you to think critically and to analyze and solve ... as certain upper-level courses in other areas (biology courses for a student ...www.millikin.edu/physics/prospective.asp