By: Rich Zwelling, Apex GMAT Instructor Date: 4th March, 2021 In our previous post, we discussed how GMAT combinatorics problems can involve...
Combinations with Restrictions
read more
Blog
Permutations with Restrictions
By: Rich Zwelling, Apex GMAT Instructor Date: 2nd March, 2021 So far, we’ve covered the basics of GMAT combinatorics, the difference between...
What Happens When Permutations Have Repeat Elements?
As promised in the last post, today we’ll discuss what happens when we have a PERMUTATIONS situation with repeat elements. What does this mean...
An Intro to Combination Math
Last time, we looked at the following GMAT combinatorics practice problem, which gives itself away as a PERMUTATION problem because it’s...
A Continuation of Permutation Math
Review of Example From Last Post Last time, when we started our discussion of GMAT Combinatorics, we gave a brief example of GMAT permutations...
Data Sufficiency: Area of a Triangle Problem
Hey guys! Today we're checking out a geometry Data Sufficiency problem asking for the area of a triangle, and while the ask might seem...
Triangles With Other Shapes
As discussed before, now that we’ve talked about the basic triangles, we can start looking at how the GMAT can make problems difficult by...
Introduction to Combinatorics & Permutations
GMAT Combinatorics. It’s a phrase that’s stricken fear in the hearts of many of my students. And it makes sense because so few of us are taught...
Triangle Inequality Rule
One of the less-common but still need-to-know rules tested on the GMAT is the “triangle inequality” rule, which allows you to draw conclusions...