For x and y integers, is xy even? (1) x2 + y2 is odd. (2) x : DS Archive
Check GMAT Club App Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

It is currently 03 Dec 2016, 08:08
GMAT Club Tests

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

For x and y integers, is xy even? (1) x2 + y2 is odd. (2) x

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 09 Sep 2004
Posts: 164
Followers: 1

Kudos [?]: 8 [0], given: 0

For x and y integers, is xy even? (1) x2 + y2 is odd. (2) x [#permalink]

Show Tags

New post 29 Oct 2004, 07:34
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

For x and y integers, is xy even?

(1) x2 + y2 is odd.
(2) x + y is even.

Pls explain
Senior Manager
Senior Manager
User avatar
Joined: 06 Dec 2003
Posts: 366
Location: India
Followers: 1

Kudos [?]: 11 [0], given: 0

Re: DS - XY [#permalink]

Show Tags

New post 29 Oct 2004, 07:59
ninomoi wrote:
For x and y integers, is xy even?

(1) x2 + y2 is odd.
(2) x + y is even.

Pls explain


Answer should be A

ODD + EVEN = ODD, otherwise EVEN

ODD * ODD = ODD, otherwise EVEN

So, xy to be even atleast one of them should be EVEN.

(A) X^2 + y^2 = ODD then one of them must be ODD and the other should be EVEN (as you know square of even is even and square of odd is odd)
clearly says, xy must be EVEN

(B) says X + Y = EVEN, so either both X and Y are ODD or both X and Y are EVEN.
If both are ODD - then XY = ODD and
if both are EVEN then XY = EVEN so, B can not answer the Question.


Please post OA
Dharmin
_________________

Perseverance, Hard Work and self confidence

Manager
Manager
avatar
Joined: 09 Sep 2004
Posts: 164
Followers: 1

Kudos [?]: 8 [0], given: 0

 [#permalink]

Show Tags

New post 29 Oct 2004, 11:15
Yep, the ans is A. Thanks for your help! :lol:
  [#permalink] 29 Oct 2004, 11:15
Display posts from previous: Sort by

For x and y integers, is xy even? (1) x2 + y2 is odd. (2) x

  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®.