Articles published in Data Sufficiency

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


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


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


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


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)



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

Manhattan Prep’s GMAT® study app is now available!


I am very excited to announce that our new GMAT® study app is available on both iOS and Android!

Download now!



Read more

Here’s why you might be missing GMAT Data Sufficiency Problems (Part 1)


Why are you missing data sufficiency problems blogLet’s talk about GMAT Data Sufficiency.

Specifically, let’s talk about getting GMAT Data Sufficiency (DS) problems wrong. And I don’t mean those problems that you missed because of careless math errors, or because of concepts you hadn’t learned yet. No, I’m talking about the missed DS problems that make you want to bang your head against the wall: How on Earth did I not get that?

There are two reasons you might have this experience: Read more

GMAT Data Sufficiency: Ratio Stories – Part 2


Social-RatioStoriesRecently, we took a look at a story problem dealing with ratios, and I finished up by giving you a second problem to test your skills. How did you do?

If you haven’t already, try the GMATPrep® problem below and then we’ll talk about it. Give yourself about 2 minutes. Go! Read more

GMAT Data Sufficiency Ratio Stories — Part 1



How are you with story problems? Most math concepts can be presented in story form on the test and the GMAT test writers do like to get wordy with us. You’ve got a double task: you have to translate the words into math and then you still have to do the math! How can we get through these as efficiently as possible?

Try the GMATPrep® problem below and then we’ll talk about it. Give yourself about 2 minutes. Go!

Read more

The Importance of Getting to No on the GMAT — Part 1


Social-No-Pt1Recently, a colleague of mine shared this very interesting puzzle published by the New York Times. (Thanks, Ceilidh!)

Go ahead and try it. I’ll wait. After you’ve tried the puzzle, you can read the short article that goes with it.

What did you learn about how humans tend to think? More important, what did you learn about how you think?

That tendency to look for the no, or to try to disprove something, is a trait shared by scientists, devil’s advocates, and great standardized test takers. You can learn to make this your natural reaction, too!

Read more