|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
01 Nov 2020, 00:15
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
70% (01:02) correct
30%
(01:14)
wrong
based on 107
sessions
History
Date
Time
Result
Not Attempted Yet
If m is a positive integer and n is an even prime number, which of the following can be the GCD of 20m and 6n?
A. 2
B. 4
C. 6
D. 10
E. 30
A. 2
B. 4
C. 6
D. 10
E. 30
Bunuel
n= can only be 2
so 6n= 12
All factors of 12 = 1*2*3*4*6*12 ( GCD of 6n and 20m has to be one among these )
if m is 1 then GCD= 4
If m =2 then GCD= 4
if m =3 then GCD= 12
Hence among the options the greatest value of GCD that is possible is 4
Ans- B
Hope it's clear.
01 Nov 2020, 05:05
Kudos
Bookmarks
stne
Hi,
The GCF when m=3 will be 12.
60=2*2*3*5 and 12=2*2*3 so, 2^2*3=12.
Thus I think the answer has to be 4.
Thank you
Posted from my mobile device
