GMAT Algebra Shortcut – GMAT Official Guide 2020 PS #207
One of the more challenging GMAT algebra questions from the GMAT Official Guide 2020 is question #207. My students often ask me about it so my guess is that you could use some help with it, too. Here is a video answer explanation breaking it down for you step-by-step. In it I take a non-standard […]
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 […]
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? […]
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 […]
GMAT Tip of the Week – Week of 9/26/11
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GMAT Tip of the Week for the week of September 26, 2011 This week’s GMAT tip* has to do with problem solving questions involving geometry. Enjoy! * Each week, one of the GMAT experts at Dominate the GMAT shares a valuable GMAT test-taking tip, strategy, trick, or content item. These tips are designed to augment […]
Solving for “x” in GMAT Algebraic Equations
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I want to get back to the basics in this blog post. As you’ve probably noticed in your GMAT prep, a lot of times you have to do basic math in the context of solving more difficult or complex GMAT math problems. We spend a lot of time teaching you how to solve those more […]
GMAT Math – Inequalities with Two Variables
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Inequalities on GMAT problem solving questions are pretty straightforward. In their most basic form, you solve an inequality almost exactly like you solve an equation, remembering to reverse the inequality sign if you end up multiplying or dividing by a negative number. Nothing earth-shattering there. But what about more difficult GMAT inequalities involving two variables? […]
GMAT Mixture Problems (Algebraic Solution)
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Mixture problems (dry or chemical) are a common type of word problem tested on the GMAT. They all work essentially the same way and are relatively easy once you know what you’re supposed to do. In my video lesson “Problem Solving — Common GMAT Word Problems,” I teach a non-traditional strategy for solving mixture problems […]
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