## GMAT Primes and the “Magic” of the Number 2

Numbers play an important role on the quantitative section of the GMAT, for obvious reasons, and arguably the most important numbers tested are prime numbers. As a reminder, a prime number is any number whose only two factors are 1 and itself. The first ten prime numbers, which you should know for the GMAT, are […]

## Understanding Pi on the GMAT – Happy Pi Day!

It’s Pi Day, March 14th (3.14)! In celebration, I want to share a quick mindset about Pi that I think you’ll find really helpful. I had a student ask me recently how to “solve for pi” in GMAT geometry questions. We went back and forth and it turns out she was really confused about the concept […]

## GMAT Interest Rate Problems – Part 2: Compound Interest

In “GMAT Interest Rate Problems – Part 1” we looked at simple interest and the way it’s commonly tested on the GMAT. What makes it “simple” is the fact that interest is accrued over one (1) time period, generally one year. If you invest $5,000 and earn an interest rate of 5%, it’s assumed that […]

## GMAT Interest Rate Problems – Part 1: Simple Interest

Picture this: You go to the bank and open a savings account. They offer you a CD with an interest rate of 5% (not likely in today’s market, but stick with me here). You deposit $5,000 into that CD. Question: How much money will you have at the end of the year? Pretty simple, right? […]

## GMAT Number Theory: How to Reason Your Way to a Right Answer

The GMAT is a reasoning test. It’s not a math test. It’s not an English grammar test. It’s not a writing test. Sure, there are elements of all of that in the questions you have to answer. But ultimately, the GMAT is a reasoning test. For proof, look no further than the names of the […]

## Solving GMAT Factorials

GMAT problem solving questions that contain the words “How many ways…?” may land you in a situation where you have to deal with factorials. Of course, we have useful strategies for getting certain of these types of questions right without resorting to combinatorics. However, sometimes the fastest and easiest way to answer these questions is […]

## The Art of Transformation on GMAT Algebra Questions

GMAT Math Tip: Start With the End in Mind Sometimes we overcomplicate GMAT algebra questions. Actually, let me rephrase that. Sometimes we see what looks to be a challenging GMAT algebra question, we freak out, we convince ourselves that we don’t even know where to begin, and we all but throw in the towel. Ever been […]

## GMAT Probability – Addition Rule Nuance

Pay Attention to Mutually Exclusive Events Pretty much all probability questions on the GMAT can be answered using three core rules. We teach them in detail in our Probability and Combinatorics course, but I want to take a second to tease out an important nuance to the Addition Rule (officially known as the “Union” rule) […]

## Learn to Dominate GMAT Probability & Combinatorics Questions

Free GMAT Math Webinar August 17th, 2016 Probability and combinatorics questions can be among the most challenging on the GMAT quantitative section for many students. But they don’t have to be. Join us on Wednesday, August 17th 2016 as we host “Ace the GMAT” author Brandon Royal for a special free class where he’s going […]

## Learn the Inside Scoop for Dominating the GMAT

Podcast Interview with Linda Abraham (Accepted) Have a GMAT or GRE coming up? Learn what it takes to truly succeed on those tests. I was honored to be the featured guest on Accepted.com‘s July 2015 podcast. Click HERE to listen to my interview with Linda Abraham, CEO and Founder of Accepted, for invaluable GRE tips […]