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

It is currently 24 Jul 2014, 09:05

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

A and B are integers, is (0.5)^{AB}>1?

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
User avatar
Status: Never ever give up on yourself.Period.
Joined: 23 Aug 2012
Posts: 138
Location: India
Concentration: Finance, Human Resources
Schools: Mays '16
GMAT 1: 570 Q47 V21
GMAT 2: 690 Q50 V33
GPA: 3.5
WE: Information Technology (Investment Banking)
Followers: 8

Kudos [?]: 70 [0], given: 35

A and B are integers, is (0.5)^{AB}>1? [#permalink] New post 17 Feb 2013, 19:58
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

43% (01:45) correct 57% (00:56) wrong based on 37 sessions
A and B are integers, is (0.5)^{AB}>1 ?

1. A is positive integer and B is negative integer.

2. A and B are two consecutive numbers.
[Reveal] Spoiler: OA

_________________

Don't give up on yourself ever. Period.
Beat it, no one wants to be defeated (My journey from 570 to 690) : beat-it-no-one-wants-to-be-defeated-journey-570-to-149968.html

Moderator
Moderator
User avatar
Joined: 02 Jul 2012
Posts: 1226
Location: India
Concentration: Strategy
GMAT 1: 740 Q49 V42
GPA: 3.8
WE: Engineering (Energy and Utilities)
Followers: 61

Kudos [?]: 625 [0], given: 116

GMAT Tests User Premium Member
Re: A and B are integers, is (0.5)^{AB}>1? [#permalink] New post 17 Feb 2013, 20:53
Although each statement IS sufficient on its own,the statements are contradictory to each other... Are you sure the question is right?
_________________

Did you find this post helpful?... Please let me know through the Kudos button.

Thanks To The Almighty - My GMAT Debrief

GMAT Reading Comprehension: 7 Most Common Passage Types

Expert Post
Veritas Prep GMAT Instructor
User avatar
Joined: 16 Oct 2010
Posts: 4573
Location: Pune, India
Followers: 1029

Kudos [?]: 4468 [0], given: 162

Re: A and B are integers, is (0.5)^{AB}>1? [#permalink] New post 18 Feb 2013, 20:41
Expert's post
daviesj wrote:
A and B are integers, is (0.5)^{AB}>1 ?

1. A is positive integer and B is negative integer.

2. A and B are two consecutive numbers.


Is (\frac{1}{2})^{AB}>1

Notice that when you raise 1/2 to a positive integer power, the value keeps going down.
(1/2)^2 = 1/4;
(1/2)^3 = 1/8;
(1/2)^4 = 1/16 etc

On the other hand, when you raise 1/2 to a negative integer power, you get a value greater than 1 in all cases
(1/2)^(-1) = 2
(1/2)^(-2) = 4
and so on...

When you raise (1/2) to 0, you get 1.

1. A is positive integer and B is negative integer.
This means that AB is a negative integer.
So (1/2)^AB will be greater than 1 in all cases. Answer is Yes. Sufficient.

2. A and B are two consecutive numbers.
The product of two consecutive integers will be either a positive integer or 0. In either case, (1/2)^AB will not be greater than 1. Answer is No. Sufficient.

Notice that the answer obtained from the two statements in definitive in each case but contradictory (statement 1 says yes, 2 says no). This does not happen in actual GMAT questions.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Save $100 on Veritas Prep GMAT Courses And Admissions Consulting
Enroll now. Pay later. Take advantage of Veritas Prep's flexible payment plan options.

Veritas Prep Reviews

Re: A and B are integers, is (0.5)^{AB}>1?   [#permalink] 18 Feb 2013, 20:41
    Similar topics Author Replies Last post
Similar
Topics:
6 Experts publish their posts in the topic If a and b are non-zero integers, and a/b > 1, then which of fozzzy 8 21 Jun 2013, 21:26
2 Experts publish their posts in the topic If x is an integer, is |x|>1. Bluelagoon 6 27 Apr 2012, 15:14
8 Experts publish their posts in the topic If x is an integer, is |x| > 1? ssgomz 11 06 Aug 2010, 14:53
X/|X| <X>1 B) X>-1 C) |X|<1> 1 shoonya 14 07 Aug 2007, 17:45
an integer > 1 that is not prime is called composite. If chanmat 5 26 Nov 2006, 15:07
Display posts from previous: Sort by

A and B are integers, is (0.5)^{AB}>1?

  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®.