Jeff Sackmann
About the Author
Jeff Sackmann has been helping students like you reach their GMAT score goals for nearly a decade. Jeff began as a star tutor and classroom teacher for a big test-prep company. Since 2006, he has focused on developing the best materials in the industry, saving you time, money, and stress.
Based in New York City, Jeff has created many resources for GMAT preparation, including the popular Total GMAT Math and Total GMAT Verbal, as well as 1,800 practice GMAT math questions and his Guides to the Official Guide.
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Total GMAT Math FAQ


If you're new to this site, this may be the first you've heard of my recently-released Total GMAT Math. In short: it's a one-stop resource for all the math you need–tutorials, exercises, practice questions–for the GMAT. (You can read an excerpt here.) If you're a regular, you may be sick of hearing about it already. Tips unrelated to the GMB will recommence later this week.

Since publishing Total GMAT Math a couple of weeks ago, I've been bombarded by questions about it. Here are answers to some of the more common ones.

Does any of the book overlap with your site or your other resources?

No. I borrowed a couple of paragraphs from the site, but that's it. The 200 practice questions in the book are all based on Official Guide practice questions, but they are completely original.

Here's my Total GMAT Math going to help me?

The GMB may not be a one-size fits all solution to your preparation needs, but it's close. It was designed that way, as I've worked with a wide range of students over the years. If you are just starting out, especially if you haven't done math in a long time, the book is probably the best option for you on the market, as it starts with the most basic stuff, from adding fractions to exponent rules and formulas for word problems.

If you're closer to your target score, you may end up skipping many of the more basic sections of the book, but the GMB is still likely to help. I've always found that the difference between a 650 and a 700 isn't in nailing a few really hard questions, it comes from executing on more of the middle level questions. If you're scoring in the 70th or 80th percentile of the Quant section and are aiming for more, I guarantee you that there are some relatively basic areas–maybe rates, radicals, or factors and multiples–that you need to polish up on. The GMB will help you do that.

Does Total GMAT Math cover Data Sufficiency?

Yes. There's a tutorial on DS in the book, and close to half of the practice questions are Data Sufficiency questions. Some of the content-specific tutorials also include tips on what kind of DS questions to expect in that area.

Does the book cover probability, combinations, and permutations?

Yes. It also covers symbolism, functions, and sequences. There's a chapter, with accompanying exercises and practice questions, on each of those six topics. With very rare exceptions, if it's on the GMAT, it's in this book.

How can I buy the book?

If you'd like to purchase Total GMAT Math, click here for a variety of purchase options.

If you have other questions, feel free to contact me!