Bases Between -1 and 1

Bases Between -1 and 1

Many GMAT and Executive Assessment (EA) exponent problems – especially data sufficiency ones – require you to consider fractional bases. By this I mean proper fractions with values between -1 and 1, not improper fractions whose numerators exceed their...
Should You Hire An Expensive GMAT Tutor?

Should You Hire An Expensive GMAT Tutor?

By: Apex GMAT Contributor: Ivan Minchev Date: 1 July, 2021 The GMAT is a relatively different exam from what most people would expect. It requires a more involved approach when it comes to preparation. There’s a whole array of ways one can prepare for the GMAT, such...
Permutations with Restrictions

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 permutations and combinations, some basic permutation and combination math, and permutations with repeat elements. Now, we’ll...