Articles published in Data Sufficiency

Here’s Why You’re Getting Geometry Problems on GMAT Data Sufficiency Wrong

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Manhattan Prep GMAT Blog - Here's Why You're Getting Geometry Problems on GMAT Data Sufficiency by Ceilidh EricksonDid you know that you can attend the first session of any of our online or in-person GRE courses absolutely free? We’re not kidding! Check out our upcoming courses here.


I had a student recently whose Data Sufficiency (DS) accuracy was generally very high, and whose knowledge of geometry rules was solid. And yet, she was getting almost every geometry DS question wrong on practice tests!

This is actually very common: students who are otherwise good at geometry and/or DS struggle when the two things are put together.

Here are the 3 main reasons that students miss geometry DS problems: Read more

Taking the new mini-GMAT for EMBA? Here’s how to prep! – Part 2

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Manhattan Prep GMAT Blog - Taking the New Mini-GMAT for EMBA Candidates? Here's How to Prep (Part 2) by Stacey KoprinceDid you know that you can attend the first session of any of our online or in-person GMAT courses absolutely free? We’re not kidding! Check out our upcoming courses here.


Last time, we talked about the IR and Verbal sections of the new Executive Assessment (EA) exam for EMBA candidates. Today, we’re going to dive into Quant and also talk more about your overall study. Read more

Easy Answers Are Lousy Answers on the GMAT

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Manhattan Prep GMAT Blog - Easy Answers Are Lousy Answers on the GMAT by Chelsey CooleyDid you know that you can attend the first session of any of our online or in-person GMAT courses absolutely free? We’re not kidding! Check out our upcoming courses here.


The number one rule in my GMAT classes is this: we stay in control of the test, not the other way around. Many GMAT questions have both a right answer, and an answer they hope you’ll pick — and those often aren’t the same! Learn to recognize the “too easy” answers that the test writers want you to pick, and stay far away from them. Read more

Decoding Divisibility and Primes on the GMAT – Part 2

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Decoding Divisibility and Primes on the GMAT Part 2Did you know that you can attend the first session of any of our online or in-person GMAT courses absolutely free? We’re not kidding! Check out our upcoming courses here.


Welcome to the 2nd installment of our dive into Number Properties. If you haven’t yet tried the first problem, start with the first article in the series.

Let’s dive right into our second problem from the GMATPrep® free exams: Read more

Decoding Divisibility and Primes on the GMAT – Part 1

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blog-decoding-pt1Most of my students are driven crazy by GMAT Number Properties. On the face of it, the topic seems straightforward: I know what positive and negative, odd and even are. Divisibility stuff is a little more complicated, but come on: this was taught in school when we were 10! How hard can it be? Read more

Here’s What to Do When You Don’t Know What to Do on the GMAT

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blog-what-to-doYou’re staring at a GMAT problem that you just don’t understand. There’s a minute left on the clock. What do you do? Read more

Here’s How to do GMAT Unit Conversions Like a Pro

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blog-metricsSometimes the whole point of a specific GMAT problem is to convert between miles and kilometers, or meters and centimeters. In other problems, you’ll need to do a unit conversion as part of a longer solution. It’s easy to mess up unit conversions, and the GMAT writers know this — they include them on the test in order to test your level of organization and your ability to double-check your work. Here’s how to add fast unit conversions to your repertoire of skills.   Read more

Three things to love about GMAT Roman numeral problems

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blog-numeralsI. Roman numeral Quant problems aren’t a whole lot of fun.

II. A lot of my students choose to skip them entirely, which is much smarter than wasting five minutes wondering what to do!

III. However, it’s possible to turn this rare and tricky problem type into an opportunity.

Read on, and learn why many GMAT high-scorers love Roman numeral problems. Read more

Avoiding Calculations on GMAT Data Sufficiency

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Blog-CalculationsThe beautiful thing about Data Sufficiency is that we’re allowed not to do all of the calculations that a Problem Solving problem might require. Still, leave it to the GMAT to try to suck you into doing more than you need to do in order to get to the answer.

Normally, I just toss you into a problem and then we discuss, but today I’m going to warn you: the GMATPrep® problem that I’m about to give you is going to do its best to make you waste time. As you try this problem, ask yourself, “Do I really need to do that calculation? Is there an easier way?”

Try this problem from the GMATPrep free exams. Read more

Here’s why you might be missing GMAT Data Sufficiency problems (Part 2)

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In our previous article, we divided the logical errors that test-takers make on Data Sufficiency questions into two types:

Type 1: You thought that something was sufficient, but it was actually insufficient.

Type 2: You thought that something was insufficient, but it was actually sufficient.

We already covered the most common reasons for Type 1 errors to occur and a few good ways to avoid them; now, let’s cover Type 2 errors. Read more