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

It is currently 16 Apr 2014, 05:27

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

If r and t are positive integers, is rt even?

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
Joined: 27 Dec 2009
Posts: 172
Followers: 2

Kudos [?]: 18 [0], given: 3

GMAT Tests User
If r and t are positive integers, is rt even? [#permalink] New post 31 Jan 2010, 13:28
00:00
A
B
C
D
E

Difficulty:

  25% (low)

Question Stats:

80% (01:49) correct 19% (00:41) wrong based on 46 sessions
If r and t are positive integers, is rt even?

(1) r + t is odd
(2) r^t is odd
[Reveal] Spoiler: OA

Last edited by Bunuel on 04 Jul 2013, 05:48, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 17281
Followers: 2866

Kudos [?]: 18326 [0], given: 2345

GMAT Tests User CAT Tests
Re: DS : Odd - even [#permalink] New post 31 Jan 2010, 13:53
Expert's post
CEO
CEO
User avatar
Status: Nothing comes easy: neither do I want.
Joined: 12 Oct 2009
Posts: 2793
Location: Malaysia
Concentration: Technology, Entrepreneurship
GMAT 1: 670 Q49 V31
GMAT 2: 710 Q50 V35
Followers: 159

Kudos [?]: 827 [0], given: 235

GMAT Tests User Reviews Badge
Re: DS : Odd - even [#permalink] New post 02 Feb 2010, 09:13
It should be A only, same explanation above.
_________________

Fight for your dreams :For all those who fear from Verbal- lets give it a fight

Money Saved is the Money Earned :)

Jo Bole So Nihaal , Sat Shri Akaal

:thanks Support GMAT Club by putting a GMAT Club badge on your blog/Facebook :thanks



Gmat test review :
670-to-710-a-long-journey-without-destination-still-happy-141642.html

Manager
Manager
Joined: 10 Feb 2010
Posts: 196
Followers: 2

Kudos [?]: 29 [0], given: 6

GMAT Tests User
Re: DS : Odd - even [#permalink] New post 12 Feb 2010, 14:47
A

1. One of r,t is even -- so sufficient
2. r is odd, no information on t -- insufficient
Manager
Manager
Joined: 26 Nov 2009
Posts: 178
Followers: 3

Kudos [?]: 53 [0], given: 5

GMAT ToolKit User GMAT Tests User
Re: DS : Odd - even [#permalink] New post 14 Feb 2010, 22:28
r and t are positive integers, is rt even?
a. r + t is odd
b. r^t is odd



a. if r+t is odd then at least either r or t should be even so if any one of the 2 numbers is even then their product should be even

so choice a is sufficient

b. if r and t both are odd then rt is odd
if r is even and t is odd then rt is even

so choice b is insufficient

so my choice is A
Director
Director
Joined: 29 Nov 2012
Posts: 936
Followers: 11

Kudos [?]: 157 [0], given: 543

Re: r and t are positive integers, is rt even? a. r + t is odd [#permalink] New post 04 Jul 2013, 05:40
Statement

1 is A+B = odd >> so one has to be even the other odd >> sufficient!

2 R^T= odd

Take examples

3^2 = 9 >> 3*2 = 6 Answer is yes

3^1 = 1 >> 3*1 = 3 Answer is no

Insufficient!
_________________

Click +1 Kudos if my post helped...

Amazing Free video explanation for all Quant questions from OG 13 and much more http://www.gmatquantum.com/og13th/

GMAT Prep software What if scenarios gmat-prep-software-analysis-and-what-if-scenarios-146146.html

Re: r and t are positive integers, is rt even? a. r + t is odd   [#permalink] 04 Jul 2013, 05:40
    Similar topics Author Replies Last post
Similar
Topics:
New posts If r, s, and t are positive integers, is r + s + t even? (1) gluon 5 15 Sep 2007, 14:46
New posts If r and t are positive integers, is rt even? avenger 7 02 Oct 2007, 12:30
New posts Is the positive integer r an even number? (1) r is a prime dancinggeometry 2 05 Sep 2008, 02:44
New posts Experts publish their posts in the topic if | r | != 1 is integer r even 1 r is not positive 2 2r rxs0005 9 14 Aug 2010, 03:38
New posts 1 Is Integer r even? enigma123 7 06 Jul 2011, 06:51
Display posts from previous: Sort by

If r and t are positive integers, is rt even?

  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®.