Is 30 a factor of n? (1) 30 is a factor of n^2 (2) 30 is a : DS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 16 Jan 2017, 04:16

### 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

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Is 30 a factor of n? (1) 30 is a factor of n^2 (2) 30 is a

Author Message
Senior Manager
Joined: 14 Jul 2005
Posts: 402
Followers: 1

Kudos [?]: 26 [0], given: 0

Is 30 a factor of n? (1) 30 is a factor of n^2 (2) 30 is a [#permalink]

### Show Tags

22 Aug 2006, 21:25
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 2 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Is 30 a factor of n?

(1) 30 is a factor of n^2
(2) 30 is a factor of 2n

A) Statement 1 alone is sufficient but statement 2 alone is not sufficient to answer the question asked.
B) Statement 2 alone is sufficient but statement 1 alone is not sufficient to answer the question asked.
C) Both statements 1 and 2 together are sufficient to answer the question but neither statement is sufficient alone.
D) Each statement alone is sufficient to answer the question.
CEO
Joined: 20 Nov 2005
Posts: 2911
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 24

Kudos [?]: 273 [0], given: 0

### Show Tags

22 Aug 2006, 22:31
C

St1:
True for n^2 = 900
False for n^2 = 60: INSUFF

St2:
True for 2n = 60
False for 2n = 30: INSUFF

Together:
n must be an integer. So n could be 15,30,45,60......
But squares of odd values are not divisible by 30. So n is 30,60,90.....
Hence 30 is a factor of n.: SUFF
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Current Student
Joined: 28 Dec 2004
Posts: 3384
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 15

Kudos [?]: 281 [0], given: 2

### Show Tags

23 Aug 2006, 05:35
OK I am with C as well..but my approach is slightly different

the question is are the prime factors of n=2,3 and 5?

1) n^2= has factors 2,3 and 5...but we dont know anything about n...Insuff
2) 2n= has prime factors 2, 3 and 5..well we can just cancel out the 2s...so we know n has prime factors 3 and 5...for sure..insuff

combining...well n^2= has a prime factor of 2, so n must have 2 (we got that from st1) and we know that n has prime factors (3 and 5) from st.2...Sufficient..
Manager
Joined: 09 Jul 2006
Posts: 85
Location: India
Followers: 1

Kudos [?]: 1 [0], given: 0

### Show Tags

23 Aug 2006, 09:07
right fresinha12. I took the same approach .. got C as the answer.
_________________

Cheers!
Prashrash.

23 Aug 2006, 09:07
Display posts from previous: Sort by