It is currently 19 Nov 2017, 05:54

### 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

# If Y is the smallest positive integer such that 3150

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Intern
Joined: 11 May 2004
Posts: 46

Kudos [?]: 4 [0], given: 0

Location: USA
If Y is the smallest positive integer such that 3150 [#permalink]

### Show Tags

14 Jun 2006, 19:26
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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

?????

Kudos [?]: 4 [0], given: 0

Director
Joined: 16 Aug 2005
Posts: 937

Kudos [?]: 30 [0], given: 0

Location: France
Re: GMAT MATH SET 15 P 25 [#permalink]

### Show Tags

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!

Kudos [?]: 30 [0], given: 0

SVP
Joined: 30 Mar 2006
Posts: 1728

Kudos [?]: 102 [0], given: 0

### Show Tags

15 Jun 2006, 00:07
Ans 14

3150 * 14 = 441 * 100
= 21* 21 * 10 * 10

Kudos [?]: 102 [0], given: 0

Director
Joined: 06 May 2006
Posts: 790

Kudos [?]: 40 [0], given: 2

### Show Tags

15 Jun 2006, 00:11
Factorize the number, and you'll find that only 2 and 7 are the non-squared factors. Answer E.

Kudos [?]: 40 [0], given: 2

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5032

Kudos [?]: 453 [0], given: 0

Location: Singapore

### Show Tags

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

Kudos [?]: 453 [0], given: 0

Manager
Joined: 10 May 2006
Posts: 186

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

Location: USA

### Show Tags

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.

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

CEO
Joined: 20 Nov 2005
Posts: 2892

Kudos [?]: 336 [0], given: 0

Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008

### Show Tags

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

Kudos [?]: 336 [0], given: 0

16 Jun 2006, 13:08
Display posts from previous: Sort by

# If Y is the smallest positive integer such that 3150

 post reply Question banks Downloads My Bookmarks Reviews Important topics

Moderator: chetan2u

 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®.