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

It is currently 16 Sep 2014, 21:48

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 x^3y^4=5,000, is y=5?

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
User avatar
Joined: 20 Mar 2005
Posts: 170
Followers: 2

Kudos [?]: 11 [0], given: 0

If x^3y^4=5,000, is y=5? [#permalink] New post 01 Jul 2007, 06:44
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Q5
If x^3y^4=5,000, is y=5?
(1)y is a positive integer.
(2)x is an integer.
____________________________________________________________
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is
sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Senior Manager
Senior Manager
User avatar
Joined: 28 Feb 2007
Posts: 308
Followers: 1

Kudos [?]: 28 [0], given: 0

GMAT Tests User
 [#permalink] New post 01 Jul 2007, 09:10
go with C.

statement-1) Insuff. Because

a) NO: 1^4*(third root of 5000) ^3=5000 ,
y=/=5 (here y=1)but positive integer

b) YES: 5000= 5^4*2^3

Statement-2) Insuff. Because

a) 5000=(fourth root of 5)^4 * 10^3 ------NO, here y=fourth root of 5.

b) YES: 5000= 5^4*2^3

Statement 1+2) SUFF. 5000=5^4*2^3.
Manager
Manager
avatar
Joined: 03 Mar 2007
Posts: 166
Followers: 1

Kudos [?]: 7 [0], given: 0

 [#permalink] New post 01 Jul 2007, 12:02
I got A.

1- y is a positive integer.

5000 = (2^3)(5^4)

y = 5 or -5

but it tells you that y is positive so 5.

2- INSUFF tells you nothing about y.
Director
Director
avatar
Joined: 18 Jul 2006
Posts: 532
Followers: 1

Kudos [?]: 24 [0], given: 0

GMAT Tests User
 [#permalink] New post 01 Jul 2007, 20:33
Should be C.

(1) fails when x is not integer, e.g
for y =1 => (x^1/3)^3 * (1^4) = 5000
for y =2 => (x^1/3)^3 * (2^4) = 5000
.
.
Manager
Manager
avatar
Joined: 03 Mar 2007
Posts: 166
Followers: 1

Kudos [?]: 7 [0], given: 0

 [#permalink] New post 02 Jul 2007, 08:29
Is the question:

(x^3)(y^4) = 5000

or

x^3y^4? In which case it would be x ^ 12y?
Manager
Manager
User avatar
Joined: 20 Mar 2005
Posts: 170
Followers: 2

Kudos [?]: 11 [0], given: 0

 [#permalink] New post 08 Jul 2007, 05:21
thanks to all ,

OA is C
Manager
Manager
avatar
Joined: 29 May 2007
Posts: 97
Followers: 2

Kudos [?]: 2 [0], given: 0

 [#permalink] New post 09 Jul 2007, 08:57
Can someone pls clarfiy this:

to satisfy the condition i started picking numbers:

I can think of only: x=2 and y=5

Hence both A & B will satisfy I am thinking of D..BUt OA is C..Can you please calrify..
  [#permalink] 09 Jul 2007, 08:57
    Similar topics Author Replies Last post
Similar
Topics:
5 Experts publish their posts in the topic If x^3y^4 = 5,000, is y = 5? Economist 13 24 Mar 2009, 21:12
Equation |x| + |y| = 5 encloses a certain region on the ggarr 9 17 Feb 2007, 14:04
Which of the following is perpendicular to y=5x? 1) y = -5x getzgetzu 1 05 May 2006, 22:03
x^3y^4 = 5000 Is y = 5? Priti 3 24 Aug 2005, 12:15
If x and y are integers and x + y = 5, which of the svrkpally 1 26 May 2005, 02:36
Display posts from previous: Sort by

If x^3y^4=5,000, is y=5?

  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®.