The 13th Edition of the Official Guide for GMAT Review (the Official Guide 13 or OG 13) has finally been released publicly. Here at Manhattan GMAT, we’ve done an initial analysis of the OG13 book.

1. The Official Guide 13 Is Not Radically Different

OG13 contains 907 practice problems for the main part of the GMAT (Quant & Verbal). Of those 907 problems, only 17% are new. Since you know your fraction equivalents, we don’t have to tell you that 17% is about 1 out of 6.

Out of 907 problems, 749 are repeats (yes, that’s 5 out of 6). If you already have the 12th Edition, a good way to look at the 13th Edition is as a source of 158 great new practice problems. We’ve listed them by number at the end of this post. Read more