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

It is currently 22 Oct 2014, 16:11

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

Is X*Y*Z an even integer 1. X * Y is an even integer

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 29 Aug 2005
Posts: 283
Followers: 1

Kudos [?]: 25 [0], given: 0

Is X*Y*Z an even integer 1. X * Y is an even integer [#permalink] New post 01 Jul 2008, 21:10
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions
Good question

i got tricked by this one

Is X*Y*Z an even integer
1. X * Y is an even integer
2. Y * Z is an even integer

Source :- GMAT Club tests

OA to follow later
_________________

The world is continuous, but the mind is discrete

Kaplan Promo CodeKnewton GMAT Discount CodesVeritas Prep GMAT Discount Codes
Director
Director
avatar
Joined: 27 May 2008
Posts: 552
Followers: 5

Kudos [?]: 177 [0], given: 0

Re: good DS question [#permalink] New post 01 Jul 2008, 21:15
statement 1 X*Y = A, is even
question : Is A*Z even, yes becuase A is even

Similarly for 2 Y*Z=B
A*B has to be even, becuase B is even

Answer D.

EDIT : on second thoughts, the answer should be E, the question never says that X Y Z are intergers.
So we can have
X = 1.5
Y = 4
Z = 1.5

XYZ = 9 (not even)

OR

X = 2
Y = 4
Z = 2

XYZ = 16 (even)

Last edited by durgesh79 on 01 Jul 2008, 21:19, edited 1 time in total.
Manager
Manager
avatar
Joined: 11 Apr 2008
Posts: 157
Schools: Kellogg(A), Wharton(W), Columbia(D)
Followers: 1

Kudos [?]: 55 [0], given: 0

Re: good DS question [#permalink] New post 01 Jul 2008, 21:19
Since the stem does not say that X, Y and Z are integers, we need both the statements to establish that XYZ is even.
So, IMO-C
Expert Post
CEO
CEO
User avatar
Joined: 17 Nov 2007
Posts: 3572
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 367

Kudos [?]: 1851 [0], given: 359

GMAT ToolKit User Premium Member
Re: good DS question [#permalink] New post 01 Jul 2008, 21:23
Expert's post
I guess E, because X,Y,Z can be non-integers.

For example, X=4/3, Y=3, Z=8/3: XY=4, YZ=8, but XYZ=10,(6)
_________________

HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame

Manager
Manager
avatar
Joined: 11 Apr 2008
Posts: 157
Schools: Kellogg(A), Wharton(W), Columbia(D)
Followers: 1

Kudos [?]: 55 [0], given: 0

Re: good DS question [#permalink] New post 01 Jul 2008, 21:52
walker wrote:
I guess E, because X,Y,Z can be non-integers.

For example, X=4/3, Y=3, Z=8/3: XY=4, YZ=8, but XYZ=10,(6)



I agree. I did not consider this case before. NOt C, I think its E now.
Current Student
User avatar
Joined: 05 Feb 2008
Posts: 58
Schools: IESE
Followers: 1

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

Re: good DS question [#permalink] New post 01 Jul 2008, 23:32
It's E
we don't know whether X Y Z are integers or not.
1/4 8 1/4 will give us 1/2
1 8 1 will give us 8
Senior Manager
Senior Manager
User avatar
Joined: 07 Jan 2008
Posts: 418
Followers: 3

Kudos [?]: 69 [0], given: 0

Re: good DS question [#permalink] New post 02 Jul 2008, 04:07
E!!!
We do not know whether or not X,Y,and Z are integers.
If they are not integers, then X*Y*Z is not an integer.
Example,
X=3/5
Y=5
Z=1/5
Current Student
User avatar
Joined: 12 Jun 2008
Posts: 287
Schools: INSEAD Class of July '10
Followers: 6

Kudos [?]: 36 [0], given: 0

Re: good DS question [#permalink] New post 02 Jul 2008, 04:19
Or: X=sqrt 2, Y=sqrt 2 and Z=sqrt 2 ;)
Intern
Intern
avatar
Joined: 25 May 2008
Posts: 41
Followers: 0

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

Re: good DS question [#permalink] New post 02 Jul 2008, 08:39
E.

x,y,z can be fractions also.
Re: good DS question   [#permalink] 02 Jul 2008, 08:39
    Similar topics Author Replies Last post
Similar
Topics:
If x and y are integers, is y an even integer? (1) 2y x = albany09 1 09 Oct 2008, 05:34
1 if x,y,z are integers is x(y^2 + z^3) even? vr4indian 2 29 Sep 2008, 10:40
X and Y are integers. Is Y an even integer? (1) Y^2 + X = bkk145 6 25 Oct 2007, 14:12
X and y are integers, are they even? rkatl 4 05 Oct 2006, 17:07
x+y+z is even, is x*y*z even? 1) x*y even 2) y*z odd pb_india 4 10 May 2005, 19:35
Display posts from previous: Sort by

Is X*Y*Z an even integer 1. X * Y is an even integer

  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®.