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

 It is currently 05 May 2015, 14:07

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# MGMAT Number Properties DS Question

Author Message
TAGS:
Intern
Joined: 01 Dec 2008
Posts: 28
Schools: Stern, Fuqua
Followers: 0

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

MGMAT Number Properties DS Question [#permalink]  02 Dec 2009, 11:57
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions
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?
Intern
Joined: 31 Oct 2009
Posts: 38
Followers: 1

Kudos [?]: 34 [0], given: 0

Re: MGMAT Number Properties DS Question [#permalink]  02 Dec 2009, 14:18
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
Intern
Joined: 01 Dec 2008
Posts: 28
Schools: Stern, Fuqua
Followers: 0

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

Re: MGMAT Number Properties DS Question [#permalink]  02 Dec 2009, 18:05
Wow. How do you know if you've done too many problems in a day.... Thx for the response

Posted from my mobile device
Senior Manager
Affiliations: PMP
Joined: 13 Oct 2009
Posts: 312
Followers: 3

Kudos [?]: 110 [0], given: 37

Re: MGMAT Number Properties DS Question [#permalink]  02 Dec 2009, 18:48
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

Re: MGMAT Number Properties DS Question   [#permalink] 02 Dec 2009, 18:48
Similar topics Replies Last post
Similar
Topics:
MGMAT Number Properties and wrong OG questions? 5 18 Sep 2012, 06:32
MGMAT DS question- Chapter 3 of Book 1. Number Properties 2 21 Jun 2011, 21:09
MGMAT Number properties Chapter 8 & Chapter 9 question 4 12 Mar 2010, 23:21
DS: Number Properties (GMATPrep) 8 18 Jun 2006, 12:10
DS.. properties of numbers 8 09 Mar 2006, 12:42
Display posts from previous: Sort by