It is currently 17 Nov 2017, 20:06

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

HOw many prime numbers between 1 and 100 are factors of

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 23 Mar 2008
Posts: 216

Kudos [?]: 202 [0], given: 0

HOw many prime numbers between 1 and 100 are factors of [#permalink]

Show Tags

New post 12 May 2008, 08:52
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

HOw many prime numbers between 1 and 100 are factors of 7150?

a) 1
b)2
c)3
d)4
e)5

Kudos [?]: 202 [0], given: 0

Intern
Intern
avatar
Joined: 28 Mar 2008
Posts: 34

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

Re: prime numbers [#permalink]

Show Tags

New post 12 May 2008, 09:30
7150 = 5*47*3*5*2*1

5 is the answer

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

Current Student
avatar
Joined: 28 Dec 2004
Posts: 3345

Kudos [?]: 322 [0], given: 2

Location: New York City
Schools: Wharton'11 HBS'12
Re: prime numbers [#permalink]

Show Tags

New post 12 May 2008, 09:31
puma wrote:
HOw many prime numbers between 1 and 100 are factors of 7150?

a) 1
b)2
c)3
d)4
e)5



7150=715*10 (5*2)*(5*143) (143=11*13)

so the question is how many prime number 5, 2, 5, 11, 13..5 in all E it is..

if the question is HOW MANY DIFFERENT then the answer is 4..

Kudos [?]: 322 [0], given: 2

Intern
Intern
User avatar
Joined: 29 Apr 2008
Posts: 21

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

Re: prime numbers [#permalink]

Show Tags

New post 12 May 2008, 10:41
7150 = 5*5*13*11*2 total 5 prime numbers

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

Intern
Intern
avatar
Joined: 12 May 2008
Posts: 12

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

Re: prime numbers [#permalink]

Show Tags

New post 12 May 2008, 14:17
In breaking down the prime factors, I stopped at 143, not seeing it broke down to 11 and 13. Is there a trick/easy way to spot that 143 isn't prime?

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

Re: prime numbers   [#permalink] 12 May 2008, 14:17
Display posts from previous: Sort by

HOw many prime numbers between 1 and 100 are factors of

  post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderator: chetan2u



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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.