It is currently 20 Sep 2017, 09:46

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

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

MGMAT Number Properties DS Question

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 01 Dec 2008
Posts: 27

Kudos [?]: [0], given: 1

Schools: Stern, Fuqua
MGMAT Number Properties DS Question [#permalink]

Show Tags

New post 02 Dec 2009, 12:57
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

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

HideShow timer Statistics

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

I'm not sure about this one, and couldn't find the question posted anywhere in the forum. Can anyone explain?

If C and D are integers, is C - 3D even?
(1) C and D are odd
(2) C - 2D is odd

[Reveal] Spoiler:
My initial thought was it had to be C, since if C = 3D then C-3d would be 0...OA is A though...I guess they're assuming that that 0 is not even? I thought the definition of even was remainder of 0 when dividied by 2, which would make 0 even?

Kudos [?]: [0], given: 1

Intern
Intern
avatar
Joined: 31 Oct 2009
Posts: 38

Kudos [?]: 57 [0], given: 0

Re: MGMAT Number Properties DS Question [#permalink]

Show Tags

New post 02 Dec 2009, 15:18
Where are you getting C = 3D? That's nowhere in the question as far as I see.

Here's how I see it:

Is C-3D even?

(1) tells you that C and D are both odd
Odd - (3)(Odd) = ??
Odd - (Odd)(Odd) = ??
Odd - Odd = EVEN
(1) is sufficient

(2) tells you C - 2D is odd
C - Even = Odd
C is Odd
so, Odd - 3D = ??
3D could be even or odd -- you need to know if D is even or odd and (2) does not tell you this.
(2) is insufficient

Kudos [?]: 57 [0], given: 0

Intern
Intern
avatar
Joined: 01 Dec 2008
Posts: 27

Kudos [?]: [0], given: 1

Schools: Stern, Fuqua
Re: MGMAT Number Properties DS Question [#permalink]

Show Tags

New post 02 Dec 2009, 19:05
Wow. How do you know if you've done too many problems in a day.... Thx for the response

Posted from my mobile device

Kudos [?]: [0], given: 1

Senior Manager
Senior Manager
User avatar
Affiliations: PMP
Joined: 13 Oct 2009
Posts: 298

Kudos [?]: 175 [0], given: 37

Re: MGMAT Number Properties DS Question [#permalink]

Show Tags

New post 02 Dec 2009, 19:48
and BTW, 0 is an even number.
_________________

Thanks, Sri
-------------------------------
keep uppp...ing the tempo...

Press +1 Kudos, if you think my post gave u a tiny tip

Kudos [?]: 175 [0], given: 37

Re: MGMAT Number Properties DS Question   [#permalink] 02 Dec 2009, 19:48
Display posts from previous: Sort by

MGMAT Number Properties DS Question

  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 | 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®.