If n is an integer…
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We need to determine whether n is an integer. Statement One Alone: n^2 is an integer. If n^2 is an integer, n could be …
Author: Jeff Miller
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 …
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 < 0…
May 5, 2016
GMAT OFFICIAL GUIDE DS… Solution: We are given that x is less than zero, and we must determine whether y is greater than zero. Statement One Alone: x/y < …
Is 5^k less than 1,000? (1) 5^(k+1) > 3,000 (2) 5^(k-1) = 5^k – 500
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We need to determine whether 5^k is less than 1,000. Statement One Alone: 5^(k+1) > 3,000 We can simplify the inequality 5^(k+1) > 3,000. …
If n is a positive integer, is the value of b – a at least twice the…
May 5, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that n is a positive integer, and we must determine whether the value of b – a is at least twice …