Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 18 May 2013, 08:06
Customize  |  Hide

Search
Register
New posts
Unanswered

If Y is the smallest positive integer such that 3150

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Manager
Manager
Joined: 11 May 2004
Posts: 51
Location: USA
Followers: 0

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

If Y is the smallest positive integer such that 3150 [#permalink] New post 14 Jun 2006, 19:26
If Y is the smallest positive integer such that 3150 mutlipled by Y is the square of an integer then Y must be?


A2
B5
C6
D7
E14

?????
Director
Director
User avatar
Joined: 16 Aug 2005
Posts: 950
Location: France
Followers: 1

Kudos [?]: 7 [0], given: 0

GMAT Tests User
Re: GMAT MATH SET 15 P 25 [#permalink] New post 14 Jun 2006, 19:53
GMATCUBS21 wrote:
If Y is the smallest positive integer such that 3150 mutlipled by Y is the square of an integer then Y must be?


A2
B5
C6
D7
E14

?????


3150 = 3x3 x 5x5 x 7 x 2
Hence Y = 7x2 = 14
E
_________________

I believe its yogurt!

SVP
SVP
User avatar
Joined: 30 Mar 2006
Posts: 1744
Followers: 1

Kudos [?]: 12 [0], given: 0

GMAT Tests User
 [#permalink] New post 15 Jun 2006, 00:07
Ans 14

3150 * 14 = 441 * 100
= 21* 21 * 10 * 10
Director
Director
User avatar
Joined: 06 May 2006
Posts: 791
Followers: 3

Kudos [?]: 7 [0], given: 0

GMAT Tests User
 [#permalink] New post 15 Jun 2006, 00:11
Factorize the number, and you'll find that only 2 and 7 are the non-squared factors. Answer E.
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jul 2004
Posts: 5134
Location: Singapore
Followers: 9

Kudos [?]: 87 [0], given: 0

GMAT Tests User
 [#permalink] New post 15 Jun 2006, 01:04
3150Y
= 315 * 10 * Y
= 63 * 5 * 2 * 5 * Y
= 2 * 3^2 * 5^2 * 7 * Y = m^2

Y must be 2*7 = 14
Manager
Manager
Joined: 10 May 2006
Posts: 189
Location: USA
Followers: 1

Kudos [?]: 3 [0], given: 0

GMAT Tests User
 [#permalink] New post 16 Jun 2006, 11:40
Yup, E..

Used the factoring technique.

3150 = 5*5*3*3*2*7

For this to be a perfect square, we need one more 2 and one more 7 = 14.
CEO
CEO
User avatar
Joined: 20 Nov 2005
Posts: 2934
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 7

Kudos [?]: 37 [0], given: 0

GMAT Tests User
 [#permalink] New post 16 Jun 2006, 13:08
E.

3150 = 3*3*5*5*7*2

To make it a perfect square we need 7*2 i.e 14
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

  [#permalink] 16 Jun 2006, 13:08
    Similar topics Author Replies Last post
Similar
Topics:
 New posts If y is the smallest Positive integer such that 3150 shubhangi 2 18 Feb 2004, 23:48
New posts If y is the smallest positive integer such that 3,150 mbassmbass04 4 01 Oct 2005, 16:15
Popular new posts If y is the smallest positive integer such that 3,150 desiguy 13 08 Dec 2005, 17:28
New posts If y is the smallest positive integer such that 3150 puma 3 09 May 2008, 04:54
New posts If y is the smallest positive integer such that 3,150 goalsnr 2 01 Jun 2008, 14:14
Display posts from previous: Sort by

If Y is the smallest positive integer such that 3150

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com