## The GMAT/MBA Library

Explore the world's largest collection of GMAT prep and MBA admissions content.

#### Manhattan GMAT Challenge Problem of the Week – 29 July 2013

Can you solve this week's GMAT challenge problem?

#### Manhattan GMAT Challenge Problem of the Week – 2 July 2012

To solve this week's challenge imagine two lines in a plane. They either cross, or they don’t.

#### Beat the Coordinate Geometry Blues! Part 2

Learn everything you need to know about parabolas and circles on the GMAT.

#### Manhattan GMAT Challenge Problem of the Week – 19 April 2011

Try this Data Sufficiency Challenge Problem from Manhattan GMAT involving knowledge of circles in the coordinate plane.

#### Breaking Down a GMATPrep Number Line Theory Problem

This week, we’re all about number lines: how to think about them and how to avoid traps. I think this one is deceptively tricky. Don’t [...]

#### 5 Steps for Data Interpretation

Here are 5 steps for you to follow when interpreting data on the GMAT. 1. Read the labels first. Mentally categorize each graph, chart and table. (EX: [...]

#### Breaking Down a GMATPrep Coordinate Plane Problem

This week, we’re going to tackle a harder GMATPrep® problem solving question from the topic of Coordinate Planes (a subset of Geometry). Let’s start with the [...]

#### An Overview of GMAT Data Sufficiency – Lesson Five – Summarizing Information

This video is part of a new lesson series to review Data Sufficiency on the GMAT. In the coming weeks you’ll see several more videos [...]

#### Beat The GMAT Challenge Question – August 30, 2010

Congrats to Gurpreet Singh for being selected as this week’s winner of the Beat The GMAT Challenge Question. Gurpreet will receive Premium Access to Beat [...]

#### Manhattan GMAT Challenge Problem of the Week – 15 June 2010

This is our latest Challenge Problem! As always, the problem and solution below were written by one of our fantastic instructors. Each challenge problem represents [...]

#### Knewton’s Wednesday Brutal Math Challenge – Week 2

We’re back. Great job last week. We’re once again playing for the new Knewton t-shirt. First person to answer correctly (you must show your work!) [...]

#### Know Your Equations and Formulas

One of my students asked me what I think are the three most important things in preparation for the GMAT. I said that the most [...]