If n is a positive integer, then (√3+1)^2n – (√3-1)^2n is…
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that n is a positive integer, and we must determine the tens digit of n. Statement One Alone: The hundreds digit …
Tag: Official Guide for GMAT Review 2017
In a certain business, production index p is directly
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that production index p is directly proportional to efficiency index e, which is in turn directly proportional to investment index i. …
If n and k are positive integers, is n divisible by 6?
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that n and k are positive integers, and we must determine whether √(n + k)> 2√n. We first square both sides …
What is the value of x – y
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We need to determine the value of x + y in the given figure. Let’s start by sketching the figure. In analyzing the angles …
If x is an integer, which of the following must be an even integer?
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that x is an integer, and we must determine whether x|x| < 2^x. Statement One Alone: x< 0 Since we are …
If n is a positive integer and k = 5.1*10^n, what is the value of k?
May 5, 2016
GMAT Guideline We are given that k = 5.1(10^n) and must determine the value of k. In further analyzing the equation with k, we see that k is equal …
A report consisting of 2,600 words is divided into 23…
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that a report consisting of 2,600 words is divided into 23 paragraphs. We are also given that that report has an …
In the figure above, if the area of the smaller square region is 1/2
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We begin by sketching the diagram. We are given that the area of triangular region D is 4, and we must determine the length …