Find all School-related info fast with the new School-Specific MBA Forum

It is currently 16 Sep 2014, 09:57

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

How many different prime nos are factors of the positive

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 07 Mar 2006
Posts: 352
Followers: 1

Kudos [?]: 9 [0], given: 1

GMAT Tests User
How many different prime nos are factors of the positive [#permalink] New post 30 Jul 2006, 04:22
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
How many different prime nos are factors of the positive integer n?

1) Four different prime nos are factors of 2n
2) Four different prime nos are factors of n^2



A) Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
(B) Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
(C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
(D) Each statement ALONE is sufficient.
(E) Statements (1) and (2) TOGETHER are NOT sufficient
Senior Manager
Senior Manager
avatar
Joined: 22 May 2006
Posts: 375
Location: Rancho Palos Verdes
Followers: 1

Kudos [?]: 16 [0], given: 0

GMAT Tests User
Re: DS: Gmat prep [#permalink] New post 30 Jul 2006, 07:41
zoom612 wrote:
How many different prime nos are factors of the positive integer n?

1) Four different prime nos are factors of 2n
2) Four different prime nos are factors of n^2


S1. 2n has 4 prime thus, n has 3~4prime. insuff.
S2. n^2 has 4 prime thus, n has 4 prime. suff.

B it is.
_________________

The only thing that matters is what you believe.

VP
VP
User avatar
Joined: 25 Nov 2004
Posts: 1498
Followers: 6

Kudos [?]: 28 [0], given: 0

GMAT Tests User
Re: DS: Gmat prep [#permalink] New post 30 Jul 2006, 07:42
zoom612 wrote:
How many different prime nos are factors of the positive integer n?

1) Four different prime nos are factors of 2n
2) Four different prime nos are factors of n^2

from i, it could be 3 or 4.
from ii, it should be 4.
B.
SVP
SVP
avatar
Joined: 30 Mar 2006
Posts: 1741
Followers: 1

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

GMAT Tests User
 [#permalink] New post 01 Aug 2006, 00:44
B

1) 2n has 4 prime factors. n can have 3 or 4 prime factors.
2) n^2 has 4 prime factors. Hence n will have 4 different prime factors.
Intern
Intern
avatar
Joined: 06 Jun 2006
Posts: 6
Followers: 0

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

 [#permalink] New post 01 Aug 2006, 02:48
I think the ans should be D.

Can anybody give me an example how can N have 4 prime factor when 2n have 4 prime factors. I think in that case, N would always have 3 prime factors.

Not sure if I am missing something.
GMAT Instructor
avatar
Joined: 04 Jul 2006
Posts: 1270
Location: Madrid
Followers: 23

Kudos [?]: 125 [0], given: 0

 [#permalink] New post 01 Aug 2006, 02:59
How about n=2*3*5*7? In general, any even number n with 4 prime factors, 2n (and 4n and 8n) will have 4 prime factors as well
  [#permalink] 01 Aug 2006, 02:59
    Similar topics Author Replies Last post
Similar
Topics:
How many different prime numbers are factors of the positive innate 0 30 Jul 2013, 04:54
29 Experts publish their posts in the topic How many different prime numbers are factors of the positive enigma123 12 29 Jan 2012, 17:31
8 Experts publish their posts in the topic How many different prime numbers are factors of the positive xyzgmat 11 08 Oct 2010, 16:50
1 How many different positive integers are factors of 441? lumone 4 02 Mar 2008, 13:01
How many different prime numbers are factors of the positive gmacvik 4 22 Oct 2006, 22:37
Display posts from previous: Sort by

How many different prime nos are factors of the positive

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.