Target Test Prep's 2024 GMAT Focus Edition prep is discounted for the BTG community!

Redeem
Target Test Prep
5-Day Free Trial
5-day free, full-access trial TTP

Available with Beat the GMAT members only code

MORE DETAILS
Target Test Prep
Magoosh
Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

MORE DETAILS
Magoosh

If a positive integer n is divisible by both 5 and 7

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Moderator
Posts: 2058
Joined: Sun Oct 29, 2017 4:24 am
Thanked: 1 times
Followed by:5 members

If a positive integer n is divisible by both 5 and 7

by M7MBA » Mon Apr 15, 2019 1:27 am

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

If a positive integer "n" is divisible by both 5 and 7, then "n" must also be divisible by which of the following?

I. 12
II. 35
III. 70

(A) None
(B) I only
(C) II only
(D) I and II
(E) II and III

[spoiler]OA=C[/spoiler]

Source: Official Guide
Top

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 7274
Joined: Sat Apr 25, 2015 10:56 am
Location: Los Angeles, CA
Thanked: 43 times
Followed by:29 members

by Scott@TargetTestPrep » Wed Apr 17, 2019 5:46 pm
M7MBA wrote:If a positive integer "n" is divisible by both 5 and 7, then "n" must also be divisible by which of the following?

I. 12
II. 35
III. 70

(A) None
(B) I only
(C) II only
(D) I and II
(E) II and III

[spoiler]OA=C[/spoiler]

Source: Official Guide

Since n is divisible by both 5 and 7 it MUST be divisible by the least common multiple of 5 and 7, which is 35. If we take n = 35, we see that n is not necessarily divisible neither by 12 nor by 70.

Answer: C

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage
Top
Post new topic Post Reply
• Page 1 of 1