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

It is currently 20 Aug 2014, 00:53

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

M19 Q3

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 06 Jul 2010
Posts: 75
Followers: 1

Kudos [?]: 36 [0], given: 12

GMAT Tests User
M19 Q3 [#permalink] New post 11 Jul 2011, 06:57
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Is integer x even?

1.) (x + 1)(x - 2) is even
2.) (x - 3)(x + 5) is even
[Reveal] Spoiler:
OA is C
I disagree. X could be 3 such that statement 2 is 0. As 0 is an even integer x could be even or odd. So OA should be E
Math Forum Moderator
avatar
Joined: 20 Dec 2010
Posts: 2048
Followers: 128

Kudos [?]: 898 [0], given: 376

GMAT Tests User
Re: M19 Q3 [#permalink] New post 11 Jul 2011, 13:44
heyholetsgo wrote:
Is integer x even?

1.) (x + 1)(x - 2) is even
2.) (x - 3)(x + 5) is even
[Reveal] Spoiler:
OA is C
I disagree. X could be 3 such that statement 2 is 0. As 0 is an even integer x could be even or odd. So OA should be E


OA is B and I think it's correct.

Do you still think B is NOT sufficient alone? If yes, please explain why?
_________________

~fluke

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Manager
Manager
avatar
Joined: 03 Aug 2010
Posts: 107
GMAT Date: 08-08-2011
Followers: 1

Kudos [?]: 14 [0], given: 63

Re: M19 Q3 [#permalink] New post 12 Jul 2011, 04:45
I too say it's B.

Knowing that X is an integer:

Stmt 1) if (X-2) is odd then (X+1) is even and (X-2)(X+1) is even and X is odd.
If (X-2) is even then (X+1) is odd and (X-2)(X+1) is even and X is even.
This tells us X is even or odd. Not sufficient.

Stmt 2 - For (X+3)(X+5) to be even, X has to be odd.

NB: If X is an integer and X is odd, X+1 has to be even and X-1 has to be even.

Last edited by Yalephd on 16 Jul 2011, 04:24, edited 2 times in total.
Senior Manager
Senior Manager
User avatar
Joined: 28 Jun 2009
Posts: 456
Location: United States (MA)
Followers: 14

Kudos [?]: 105 [0], given: 46

GMAT Tests User
Re: M19 Q3 [#permalink] New post 12 Jul 2011, 09:45
Good explanation Yalephd!

I tested the statements in similar manner. Additionally, I substituted actual numbers in place of X and confirmed my answer.
Re: M19 Q3   [#permalink] 12 Jul 2011, 09:45
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic m19#20 millhouse 6 28 Jun 2009, 22:06
3 M19#14 topmbaseeker 13 07 Feb 2009, 15:57
M19#13 topmbaseeker 12 07 Feb 2009, 15:25
M19 Q36 ventivish 4 12 Nov 2008, 21:26
M19 Q9 ventivish 5 12 Nov 2008, 20:38
Display posts from previous: Sort by

M19 Q3

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: Bunuel, WoundedTiger



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®.