GRE Prep 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.
Apr 24Get an Extra 30% Off Target Test Prep Plans
08:00 PM EDT
-11:59 PM EDT
Grab 30% off any Target Test Prep GRE plan during our Flash Sale and join Brian and many other students who have used Target Test Prep to score high on the GRE. Just enter the coupon code FLASH30 at checkout to save big.
If x is divisible by both 3 and 4, then the number x must be
[#permalink]
20 Apr 2018, 11:24
20 Apr 2018, 11:24
Expert Reply
00:00
Question Stats:
100% (00:28) correct
0% (00:00) wrong based on 29 sessions
Hide Show timer Statistics
If x is divisible by both 3 and 4, then the number x must be a multiple of which one of the following?
(A) 8
(B) 12
(C) 15
(D) 18
(E) 21
(A) 8
(B) 12
(C) 15
(D) 18
(E) 21
Re: If x is divisible by both 3 and 4, then the number x must be
[#permalink]
Updated on: 09 May 2018, 05:14
Updated on: 09 May 2018, 05:14
1
I got the answer right but I belive the way I made my pattern for the solution of this question is was pedestrian- if anyone could solve it in a more slick manner then it is most welcome.
For me I made two equation
X=3k+0---eq 1
X=4K+0
now multile of 3 as per eq 1 are as follows
3,6,9,12,15,18,21,24,27,30--- as we can see 12 and 24 can be dividend completely by 12 which is 3*4 hence I chose the answer B..
this took TIME ..any shortcut pls welcome
For me I made two equation
X=3k+0---eq 1
X=4K+0
now multile of 3 as per eq 1 are as follows
3,6,9,12,15,18,21,24,27,30--- as we can see 12 and 24 can be dividend completely by 12 which is 3*4 hence I chose the answer B..
this took TIME ..any shortcut pls welcome
Re: If x is divisible by both 3 and 4, then the number x must be
[#permalink]
08 May 2018, 12:22
08 May 2018, 12:22
1
Expert Reply
3*4=12
12-24-48......and so forth
B is the answer.
OR
The only number that has 3 and 4 as factors among the answer choices is 12. The others do not.
OR
because the factors are 3 and 4 the number must be even. So, C and E are out. 8 is 2^3 and 18 is 3^2 * 2. In 8 is missing the 3 and in the latter is missing the 4.
Hope is clear now.
Regards
12-24-48......and so forth
B is the answer.
OR
The only number that has 3 and 4 as factors among the answer choices is 12. The others do not.
OR
because the factors are 3 and 4 the number must be even. So, C and E are out. 8 is 2^3 and 18 is 3^2 * 2. In 8 is missing the 3 and in the latter is missing the 4.
Hope is clear now.
Regards
.. X has to be a multiple of 12.
