• GMAT Combinatorics 2.0: Permutations and Combinations

If you haven't read GMAT Combinatorics 1.0, 1.1, and 1.2, you should do that before you read any further. Even if you're familiar with some of the material, you may not be familiar with my approach. Though the subtitle of this posts suggests that I'm going to discuss permutations and ...

• GMAT Combinatorics 1.1: Practice Problems

This post will give you some practice problems related to the post GMAT Combinatorics 1.0: Introduction. These will not be GMAT type problems as MyGuru takes a bottom-up approach to test prep. We want out students to learn the fundamentals first. At a later point we'll focus on useful tricks ...

• GMAT Combinatorics 1.0: Introduction

This is an introductory post on combinatorics - the art of counting. Combinatorics is one of the most difficult parts of the GMAT because it is not part of the standard American high school curriculum. With many other troubling types of problems, such as rate questions, fraction / decimal / ...