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
In this table, we discuss a number of Sentence Correction problems from the OG12. Certain answer choices have “meaning” issues; we list the answer choice letters and provide a brief discussion of the issues involved. Note that this list is not comprehensive and is still in fairly raw form; there are additional problems and answer choices that could also contain meaning issues, and it’s possible that reasonable people will disagree with some of the things on this list (though we tried to include only the ones that we thought were most straightforward). Read more