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

It is currently 14 Jul 2014, 03:55

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

If N is an odd integer between 2 and 30, how many distinct

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 21 Jun 2006
Posts: 289
Followers: 1

Kudos [?]: 11 [0], given: 0

GMAT Tests User
If N is an odd integer between 2 and 30, how many distinct [#permalink] New post 24 Jul 2007, 21:40
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
If N is an odd integer between 2 and 30, how many distinct prime factors does it have?

3 is not a factor of N
5 is not a factor of N
Director
Director
avatar
Joined: 09 Aug 2006
Posts: 767
Followers: 1

Kudos [?]: 41 [0], given: 0

GMAT Tests User
Re: DS: odd couple [#permalink] New post 24 Jul 2007, 22:34
ArvGMAT wrote:
If N is an odd integer between 2 and 30, how many distinct prime factors does it have?

3 is not a factor of N
5 is not a factor of N


Answer : A

stat1: any number N b/w 2 & 30 that is not a multiple of 3 has only one prime factor. suff

stat2: if N= 3 then 1 prime factor; if N=21 then 2 prime factors. insuff
Senior Manager
Senior Manager
User avatar
Joined: 28 Jun 2007
Posts: 463
Followers: 2

Kudos [?]: 5 [0], given: 0

GMAT Tests User
Re: DS: odd couple [#permalink] New post 25 Jul 2007, 00:16
GK_Gmat wrote:
ArvGMAT wrote:
If N is an odd integer between 2 and 30, how many distinct prime factors does it have?

3 is not a factor of N
5 is not a factor of N


Answer : A

stat1: any number N b/w 2 & 30 that is not a multiple of 3 has only one prime factor. suff

stat2: if N= 3 then 1 prime factor; if N=21 then 2 prime factors. insuff


For... St A... I first thought u missed 25... everything else was a prime number... then realized 5*5 still means only one prime factor and 25 is not a prime factor.

Playing mind games :(
Senior Manager
Senior Manager
avatar
Joined: 21 Jun 2006
Posts: 289
Followers: 1

Kudos [?]: 11 [0], given: 0

GMAT Tests User
 [#permalink] New post 25 Jul 2007, 07:43
A is OA

I made the mistake of selecting C then realized that the only # that is a multiple of 5 is 15 and 25. 15 has 3 as a multiple so we can eliminate it and 25 has only 5 as a factor.
Senior Manager
Senior Manager
User avatar
Joined: 17 Jul 2007
Posts: 288
Location: The 408
Followers: 3

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

GMAT Tests User
 [#permalink] New post 25 Jul 2007, 07:51
C, both needed.

with 1 & 2 combined we see that prime numbers fit.
Senior Manager
Senior Manager
User avatar
Joined: 17 Jul 2007
Posts: 288
Location: The 408
Followers: 3

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

GMAT Tests User
 [#permalink] New post 25 Jul 2007, 07:52
ArvGMAT wrote:
A is OA

I made the mistake of selecting C then realized that the only # that is a multiple of 5 is 15 and 25. 15 has 3 as a multiple so we can eliminate it and 25 has only 5 as a factor.


Crap. I fell for it. :?
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3405
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 149 [0], given: 2

GMAT Tests User
 [#permalink] New post 25 Jul 2007, 08:06
Yeah Its A...

If N is an ODD integer between 2 and 30..lets list em out

3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29...

1) if 3 is not a factor of N..then its clear 15, 21 and 27 are out...which leaves us with 1 DISTINCT prime factor only... Sufficient

2) if 5 is not a factor then ..7 and 3 could still be factors or 29 which is a prime can be a factor...so insufficient..

A it is..
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 5097
Location: Singapore
Followers: 16

Kudos [?]: 131 [0], given: 0

GMAT Tests User
 [#permalink] New post 25 Jul 2007, 23:45
St1:
If 3 is not a factor of N, then N will be odd and have only one distinct prime factor.

St2:
If 5 is not a factor of N, then N could be 33, (2 distinct primes), N could be 9 (just 1 prime). Insufficient.

Ans A
Director
Director
User avatar
Joined: 16 May 2007
Posts: 549
Followers: 3

Kudos [?]: 13 [0], given: 0

GMAT Tests User
 [#permalink] New post 26 Jul 2007, 08:24
That was tricky.. i alomst went for C. the word prime factors in the question makes all the difference.
  [#permalink] 26 Jul 2007, 08:24
    Similar topics Author Replies Last post
Similar
Topics:
4 How many integers between 3000 and 4000 that have distinct arakban99 2 05 Sep 2013, 21:58
9 Experts publish their posts in the topic How many odd integers between 200 and 600 are there such aliky 9 18 Nov 2009, 11:57
If m is a positive odd integer between 2 and 30, then m is shils01 1 31 Mar 2008, 07:49
Experts publish their posts in the topic If M is a positive odd integer between 2 and 30, then M is khushi1 2 07 Dec 2007, 03:17
If m is a positive odd integer between 2 and 30, then m is nickdawg 1 26 Nov 2005, 23:52
Display posts from previous: Sort by

If N is an odd integer between 2 and 30, how many distinct

  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®.