Is 30 a factor of n?
1. 30 is a factor of n^2
2. 30 is a factor of 2n
The OA is the option A.
I think the answer should be C. Why is A? Could anyone clarify this to me? Thanks in advance. <i class="em em-pray"></i>
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Is 30 a factor of n?
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Jay@ManhattanReview
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We have to determine whether 30 a factor of n.VJesus12 wrote:Is 30 a factor of n?
1. 30 is a factor of n^2
2. 30 is a factor of 2n
The OA is the option A.
I think the answer should be C. Why is A? Could anyone clarify this to me? Thanks in advance. <i class="em em-pray"></i>
Let's take each statement one by one.
1. 30 is a factor of n^2.
Since 30 = 2*3*5 (no two prime factors), 30 must be a factor of n, else n would not be an integer. Sufficient.
2. 30 is a factor of 2n.
If n = 15, the answer is No; however, if n = 30, the answer is Yes. No unique answer. Insufficient.
The correct answer: A
Hope this helps!
-Jay
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Manhattan Review GMAT Prep
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GMAT/MBA Expert
-
Jay@ManhattanReview
- GMAT Instructor
- Posts: 3008
- Joined: Mon Aug 22, 2016 6:19 am
- Location: Grand Central / New York
- Thanked: 470 times
- Followed by:34 members
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
We have to determine whether 30 a factor of n.VJesus12 wrote:Is 30 a factor of n?
1. 30 is a factor of n^2
2. 30 is a factor of 2n
The OA is the option A.
I think the answer should be C. Why is A? Could anyone clarify this to me? Thanks in advance. <i class="em em-pray"></i>
Let's take each statement one by one.
1. 30 is a factor of n^2.
Since 30 = 2*3*5 (no two prime factors), 30 must be a factor of n, else n would not be an integer. Sufficient.
2. 30 is a factor of 2n.
If n = 15, the answer is No; however, if n = 30, the answer is Yes. No unique answer. Insufficient.
The correct answer: A
Hope this helps!
-Jay
_________________
Manhattan Review GMAT Prep
Locations: Manhattan Review Himayatnagar | Hyderabad GMAT Prep | Bangalore GMAT Courses | Kukatpally GRE Prep | and many more...
Schedule your free consultation with an experienced GMAT Prep Advisor! Click here.
