# Data Sufficiency Articles

#### Knewton Brutal Math Challenge – Week 9

The shirt is once again in play. Find the answer in the crosshairs, and bring it home. When exactly years have passed since the day on which a certain car was purchased, the value of the car has decreased by from its … Read More

#### “Layering” in Data Sufficiency Questions

This week, we have a follow-on article from Chris Ryan, Manhattan GMAT’s Director of Instructor and Product Development. Chris introduced the concept of “layering” to us in this article on Sentence Correction. … Read More

#### Manhattan GMAT Challenge Problem of the Week – 6 May 10

Welcome back to this week’s Challenge Problem! As always, the problem and solution below were written by one of our fantastic instructors. Each challenge problem represents a 700+ level question. If you are up for the … Read More

#### Knewton Brutal Math Challenge – Week 7

The “Knerd” shirts are kinda blowing up. Students at a conference last week were peaking out to them. Answer this brutal question correctly, show your work — and it will be yours. , , and are three … Read More

#### Going Green on Yes/No Data Sufficiency? Recycle, Then Mine the Overlap!

Initially, Data Sufficiency is one of the most difficult question types on the GMAT. Almost any tester exposed to DS for the first time will be met with a substantial challenge. Without the correct system for attacking … Read More

#### Data Sufficiency, Sample Problem: Don’t Do More Work Than You Have To!

Set your timers to 2 minutes and give this advanced DS Sample Question a shot! Analysis to follow. Question: Is greater than 2,500? (1) Read More

#### Knewton Brutal Math Challenge – Week 5

We have new shirts! Check them out on our Tumblr page. Be the first person to answer correctly with shown work, and the shirt shall be yours. To own. In a certain set of 300 stocks, each is priced at either $50, $100, or … Read More

#### Kaplan GMAT 13: Inequalities

Video 13 in a series of official excerpts from the Kaplan GMAT program. This video covers the basics of inequalities. The instructor is Devin Landin – over 1300 students taught and counting. Read More

#### Manhattan GMAT Challenge Problem of the Week – 16 Apr 10

Welcome back to this week’s Challenge Problem! As always, the problem and solution below were written by one of our fantastic instructors. Each challenge problem represents a 700+ level question. If you are up for … Read More

#### Kaplan GMAT 5: Combining Statements in Data Sufficiency

Here is Video 5 in our series of official excerpts from the Kaplan GMAT program. If both data sufficiency statements are insufficient individually, treat them as one long statement. The instructor is Claire Molloy … Read More

#### Kaplan GMAT Video: Calculation vs. Conceptualization

The primary goal in Data Sufficiency is to conceptualize, NOT to calculate! We’ll look more closely at the importance of this concept and one approach to categorizing Data Sufficiency questions. Read More

#### Kaplan GMAT Video: Number Properties

This in-depth look at Number Properties in Data Sufficiency questions will provide you with essential strategies, practice, and reminders for this common quantitative question type. Read More

#### Kaplan GMAT Video: The Data Sufficiency Question Type

We’ll examine the basic structure and format of the Data Sufficiency question type: a question type which is unique to the GMAT exam. Read More

#### Manhattan GMAT Challenge Problem of the Week – 1 Apr 10

Welcome back to this week’s Challenge Problem! As always, the problem and solution below were written by one of our fantastic instructors. Each challenge problem represents a 700+ level question. If you are up for … Read More