For which of the following values of k is (k + 20)/k NOT an integer?

Question

A. 1
B. 2
C. 3
D. 4
E. 5

cantaffordname · Answer

K+20/K we can write this as K/K + 20/k so the question is that whether 20 is divisible by K?

We can see that all of the option except 3 divides K properly. So IMO answer is C

Archit3110 · Answer

plug in values and solve
only option C ;is not an integer value
IMO C

Mohammadmo · Answer

1 + 20/k
20/k should be integer, so when 20 divided by k, the rimainder has to be zero.
But 3 does not have this condition.
Option C

Posted from my mobile device

Bunuel · Answer

Official Explanation

This question can be solved quickly by trying answer choices. We might as well start with 3, since it isn't a factor of 20 and will go in the denominator. Indeed, 23/3 is 7 2/3, so it is not an integer.

The correct answer is (C).

Bunuel · Answer

Video Explanation

f4TQU21jF4A

TheNightKing · Answer

For k=3, the expression becomes 23/3 which results in a decimal number and hence is not a integer.

For which of the following values of k is (k + 20)/k NOT an integer?

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

GMAT Problem Solving (PS) Questions

For which of the following values of k is (k + 20)/k NOT an integer?

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards