|
|
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.
11 Jan 2023, 02:30
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
62% (01:16) correct
38%
(00:51)
wrong
based on 47
sessions
History
Date
Time
Result
Not Attempted Yet
What is the value of the greatest common divisor of a and b?
(1) a is divisible by 15.
(2) b=2a
Another tough one...
(1) a is divisible by 15.
(2) b=2a
Another tough one...
13 Jan 2023, 02:05
Kudos
Bookmarks
Bunuel
Question: What is the value of the greatest common divisor of a and b ?
Statement 1
(1) a is divisible by 15.
Therefore we can represent a as
a = 15 * p
p is the quotient when a is divided by 15.
We don't know what the value of b is, hence the statement is not sufficient. We can eliminate A and D.
Statement 2
(2) b=2a
Well this tells us the GCD of (b, a) = a. But we don't know the exact value of a. Hence the statement is not sufficient.
Combined
The statements combined is not sufficient as well as the value of a is not known.
Option E
Moderators:
