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 [...]
“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 [...]
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 [...]
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 [...]
Going Green on Yes/No Data Sufficiency? Recycle, Then Mine the Overlap!
Recycling your work on Yes/No Data Sufficiency questions will help you maximize your efficiency on the GMAT Math section.
Data Sufficiency, Sample Problem: Don’t Do More Work Than You Have To!
Savvy GMAT testers don't do more Math than they have to!
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 [...]
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 [...]
Manhattan GMAT Challenge Problem of the Week – 16 Apr 10
A number of eggs dyed various colors were hidden for an egg hunt. How many eggs in total were hidden?
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 [...]
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 [...]
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.
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.
Manhattan GMAT Challenge Problem of the Week – 1 Apr 10
If ab ≠ 0 and a ≠ -3b, what is the value of (4a + 6b)/(a + 3b)?