If x and y are integers greater than 1, is x a multiple of : GMAT Data Sufficiency (DS) - Page 3
Check GMAT Club App Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

It is currently 07 Dec 2016, 10:23
GMAT Club Tests

Admission

Help Desk is Open: Join Chat Room1 to Discuss your Queries with MBA Expert |  Join Chat Room2 for Chicago-Booth Decision Updates


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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If x and y are integers greater than 1, is x a multiple of

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

1 KUDOS received
Senior Manager
Senior Manager
avatar
Joined: 24 Mar 2011
Posts: 457
Location: Texas
Followers: 5

Kudos [?]: 154 [1] , given: 20

Re: X and Y [#permalink]

Show Tags

New post 26 Jul 2011, 20:28
1
This post received
KUDOS
i think A.

Yalephd wrote:
If X and Y are integers greater than 1, is X a multiple of Y?

\((1) 3Y^2 + 7Y = X\)

\((2) X^2 - X\) is a multiple of \(Y.\)



1st statement - Y(3Y+1) = X implies that... X is a multiple of Y... - sufficient

2nd Statement - i am not sure the best way... but i tried to use some arbitrary smart #s which will give me X>1.
X(X-1) is multiple of Y... so ex- if Y=6, then X =3.. so X is not a multiple of Y.
or Y = 12, then X = 4 again X is not a multiple of Y.

so not sufficient.
1 KUDOS received
VP
VP
User avatar
Status: Top MBA Admissions Consultant
Joined: 24 Jul 2011
Posts: 1122
GMAT 1: 780 Q51 V48
GRE 1: 1540 Q800 V740
Followers: 120

Kudos [?]: 526 [1] , given: 19

Re: X and Y [#permalink]

Show Tags

New post 26 Jul 2011, 21:13
1
This post received
KUDOS
The answer should be (A) - statement (1) alone is sufficient to answer the question.

Consider statement (1) first:
X = 3Y^2 + 7Y
=> X = Y (3Y + 7)
=> X = Y * some number
Therefore X is a multiple of Y. So statement (1) alone is sufficient.

Next consider statement 2:
X^2 - X is a multiple of Y
=> kY = X(X-1) where k is any integer >= 1
=> X = kY/(X-1) = [k/(X-1)]Y
Therefore X is a multiple of Y depending on whether k/(X-1) is an integer or not.
For k = 4 and X = 5, this works. For k=5, X=5 it does not work.
Therefore statement (2) alone is insufficient to answer the question.

Hence (A) is the correct answer choice.
_________________

GyanOne | Top MBA Rankings and MBA Admissions Blog

Top MBA Admissions Consulting | Top MiM Admissions Consulting

Premium MBA Essay Review|Best MBA Interview Preparation|Exclusive GMAT coaching

Get a FREE Detailed MBA Profile Evaluation | Call us now +91 98998 31738

Manager
Manager
avatar
Joined: 03 Aug 2010
Posts: 106
GMAT Date: 08-08-2011
Followers: 1

Kudos [?]: 63 [0], given: 63

Re: X and Y [#permalink]

Show Tags

New post 27 Jul 2011, 05:39
agdimple333, GyanOne,
Thank you.

GyanOne, I like your approach in evaluating statement 2.
Manager
Manager
avatar
Joined: 24 Jun 2011
Posts: 58
Followers: 0

Kudos [?]: 9 [0], given: 6

Re: X and Y [#permalink]

Show Tags

New post 27 Jul 2011, 09:46
A is enough
B - > Y is a multiple of X
Manager
Manager
avatar
Status: Time to apply!
Joined: 24 Aug 2011
Posts: 220
Location: India
Concentration: Finance, Entrepreneurship
GMAT 1: 600 Q48 V25
GMAT 2: 660 Q50 V29
GMAT 3: 690 Q49 V34
GPA: 3.2
WE: Engineering (Computer Software)
Followers: 4

Kudos [?]: 107 [0], given: 166

Is x multiple of y [#permalink]

Show Tags

New post 29 Sep 2011, 07:28
If x and y are integers greater than 1, is x is a multiple of y ?

(1) 3 y^2 + 7y = x
(2) x^2 - x is a multiple of y


Sorry If I have repeated the question in the forum, but I searched for it in the existing questiosn, but couldn't find it
_________________

Didn't give up !!! Still Trying!!

Manager
Manager
User avatar
Status: Target MBA
Joined: 20 Jul 2010
Posts: 211
Location: Singapore
Followers: 0

Kudos [?]: 16 [0], given: 12

Re: GMATPrep DS: Is x a multiple of y [#permalink]

Show Tags

New post 01 Oct 2011, 00:59
themagiccarpet wrote:
If x and y are integers greater than 1, is x a multiple of y?

(1) 3y^2 + 7y = x
(2) x^2 - x is a multiple of y


(a) x = y(3y+7) => x =ky (for a given y)
Sufficient

(b) x(x-1) = ky
if k =1, then x(x-1) = y, hence not x is not a multiple of y.
if k =(x-1), then x = y, hence not x is a multiple of y
Not sufficient

A is the answer.
_________________

Thanks and Regards,
GM.

Re: GMATPrep DS: Is x a multiple of y   [#permalink] 01 Oct 2011, 00:59

Go to page   Previous    1   2   3   [ 46 posts ] 

    Similar topics Author Replies Last post
Similar
Topics:
118 Experts publish their posts in the topic If x and y are integers greater than 1, is x a multiple of y enigma123 19 29 Jan 2012, 15:21
3 Experts publish their posts in the topic If x and y are integers greater than 1, is x a multiple of y? udaymathapati 3 03 May 2011, 05:51
3 Experts publish their posts in the topic If x and y are integers great than 1, is x a multiple of y? jananijayakumar 3 13 Aug 2010, 02:07
51 Experts publish their posts in the topic If x, y, and z are integers greater than 1, and jeeteshsingh 31 21 Feb 2010, 13:20
4 Experts publish their posts in the topic If x and y are both integers greater than 1, is x a multiple chineseburned 11 04 May 2008, 18:26
Display posts from previous: Sort by

If x and y are integers greater than 1, is x a multiple of

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| 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®.