GMAT Question of the Day - Problem Solving - Exponents/Puzzle

Which of the following is equivalent to (k-4)/(√k - 2)?

A. √k + 2

B. k + 4

C. 4

D. 4k

E. 6k

AnswerShow

GMAT Question of the Day Solution

On this GMAT question of the day it is important to recognize that the denominator is one half of a difference of squares (x + y)(x - y). In this case we have the "x - y" portion. You can go ahead and multiply top and bottom by the the other half (the "x + y" part) of the special quadratic in order to get rid of the root in the denominator. Once you've done that this question breaks down to some simple arithmetic. As always - take your time with your GMAT arithmetic. Speeding through it generally leads to mistakes which will slow you down.

GMAT Question of the Day Problem Solving Exponents Solution Diagram

 

GMAT Question of the Day - Data Sufficiency - Number Properties

Is x + y positive?

(1) x - y is positive

(2) x^2 - y^2 is positive

AnswerShow

GMAT Question of the Day Solution

GMAT Question of the Day Number Properties Solution Diagram

Additional Numbers Properties, Signs, Inequalities, Practice Questions

Here's a problem solving question also dealing with satisfying an inequality and testing signs

And another couple GMAT Question of the day examples featuring number properties/positive negative/signs

GMAT Question of the Day Number Properties/Signs

GMAT Question of the Day Absolute Value/Number Properties/Signs

 

GMAT ARTICLES

CONTACT


Atlantic GMAT Tutoring

405 East 51st St.

NY, NY 10022

(347) 669-3545

info@AtlanticGMAT.com