The GMAT/MBA Library

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

Next Year Starts Now: A New Webinar Series for 2019–2020 MBA Applicants!

by mbaMission on October 3, 2018

Are you planning to apply to business school in 2019–2020? It is not too early to start preparing for your applications, and we can help! The [...]


Tackling Forbidden Choices in GMAT Combinations Questions

by Economist GMAT Tutor on September 26, 2017

Rest assured, there is an easy way to solve tricky Combinations questions.


Probability Tip: 3 Strategies That Aren’t Used Enough

by Veritas Prep on May 28, 2017

Try not to be bogged down by complex Combinatorics and Probability questions. Use these three helpful strategies.


GMAT Quantitative: Two Types of Mixture Problems

by Kaplan GMAT on May 23, 2017

Be prepared to solve questions about both proportions and combinations.


GMAT Combination Problems for a High Quant Score

by Target Test Prep on December 15, 2016

Practice high-value GMAT Combination Problems with Target Test Prep GMAT experts Scott Woodbury Stewart and Jeffrey Miller.


GMAT Quant Intimidation – Part 1

by Veritas Prep on October 28, 2016

Starting by writing out what you know is an excellent strategy for “just getting started.”


Land Your Score: Combination and Permutation Problems

by Kaplan GMAT on July 8, 2016

Master Quantitative Reasoning using the “slots method” for combinatorics.


Combinations: Consider The Grouping with the Slot Method

by Veritas Prep on May 10, 2016

Consider the slot method—your path to the right answer may be simpler than you think.


How to Become a Great GMAT Guesser – Part 3

by Manhattan Prep on April 28, 2016

Let’s talk some more about how to guess on the GMAT.


The GMAT Avengers Challenge of the Week: Permutations & Combinations – Part 2

by Sorin Istrate on March 7, 2016

Can you solve this week's Avengers challenge?


The GMAT Avengers Challenge of the Week: Permutations & Combinations

by Sorin Istrate on February 22, 2016

Can you solve this week's Avengers challenge?


GMAT Combination and Permutation Problems for High Quant Scores

by Target Test Prep on December 11, 2015

Practice high-value GMAT Combination and Permutation problems with Target Test Prep GMAT experts Scott Woodbury Stewart and Jeffrey Miller.


Counting the Divisors of Large Numbers

by GMAT Prep Now on July 30, 2015

If we want to determine the number of positive divisors of a small number like 24, we can easily list {1, 2, 3, 4, 6, [...]


Simplifying Permutations and Combinations on the GMAT

by Economist GMAT Tutor on June 24, 2015

As complicated as the Permutations and Combinations questions can be to understand, they can be quickly simplified.


Counting Practice Problems for the GMAT

by Magoosh GMAT on March 7, 2015

Try out these practice problems to help you improve your counting skills.