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

It is currently 28 May 2016, 14:10
GMAT Club Tests

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

ds.x^3*y ^4=5000, y =? 1) y is a positive integer 2) x is a

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 08 Apr 2004
Posts: 133
Location: Corea
Followers: 2

Kudos [?]: 392 [0], given: 0

ds.x^3*y ^4=5000, y =? 1) y is a positive integer 2) x is a [#permalink]

Show Tags

New post 09 Sep 2004, 21:41
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

ds.x^3*y ^4=5000, y =?
1) y is a positive integer
2) x is a integer.
Director
Director
User avatar
Joined: 05 May 2004
Posts: 577
Location: San Jose, CA
Followers: 2

Kudos [?]: 50 [0], given: 0

Re: dS: y=? [#permalink]

Show Tags

New post 09 Sep 2004, 22:17
marine wrote:
ds.x^3*y ^4=5000, y =?
1) y is a positive integer
2) x is a integer.


C

1 not sufficient .... x can be integer/not integer ... anything!
2 not sufficient .... y can be integer/not integer ... anything!

Together
x=2 ... y^4=625 or y=5
x=5 ... y^4=40 ... y is not integer
same for other values of X

Hence, y=5
Director
Director
User avatar
Joined: 31 Aug 2004
Posts: 610
Followers: 3

Kudos [?]: 87 [0], given: 0

 [#permalink]

Show Tags

New post 10 Sep 2004, 08:04
I choose A.

To me the sole not integer way is when both x and y are relative numbers, example : (2/5)^3.(5/2.sgrt(sqrt(2000))

if either x or y is integer then both are, unique issue is y sign and statement 2 does not answer it.
Senior Manager
Senior Manager
avatar
Joined: 22 Jun 2004
Posts: 393
Location: Bangalore, India
Followers: 1

Kudos [?]: 4 [0], given: 0

Re: dS: y=? [#permalink]

Show Tags

New post 10 Sep 2004, 08:15
I think it is C. 5000 = 2^3 * 5^4

(1) y is an integer. Say it is 2^4. 5000/16 and x has a vlaue.
It can also be 3^4 because x has a different value. It is because nothing is said about x-whether real or integer.

(2)Same logic applies here too.

Take 1 and 2 and it is very easy to arrive at y which is 5. Good twist is x is an integer and y is a positive integer. These constraints are necessary because the power of y is even and hence y can be +ve or -ve. Because x's power is odd, sign is reflected in the calculation.

marine wrote:
ds.x^3*y ^4=5000, y =?
1) y is a positive integer
2) x is a integer.

_________________

Awaiting response,

Thnx & Rgds,
Chandra

Manager
Manager
avatar
Joined: 02 Apr 2004
Posts: 224
Location: Utrecht
Followers: 1

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

 [#permalink]

Show Tags

New post 10 Sep 2004, 08:23
I will choose C too.

st.1
y could be 1 or 2 or 3, because x could be anything.
not sufficient.

st.2
x could be 1, or 2 or 3 and we could not know the value of y. it could be an integer or not integer.

Both statements together are sufficient to solve the value of y, because x must be an integer and y must be an positive integer. x can´t be an negative integer.

Please correct me if I am wrong.

Regards,

Alex
Director
Director
User avatar
Joined: 31 Aug 2004
Posts: 610
Followers: 3

Kudos [?]: 87 [0], given: 0

 [#permalink]

Show Tags

New post 10 Sep 2004, 09:04
5000 = 2^3.5^4

so if we assume that either x or y is an integer there is only one way to allocate values...
Senior Manager
Senior Manager
avatar
Joined: 22 Jun 2004
Posts: 393
Location: Bangalore, India
Followers: 1

Kudos [?]: 4 [0], given: 0

 [#permalink]

Show Tags

New post 10 Sep 2004, 09:11
Why should the other be integer? It can be a real number with recurring decimals!! We just cannot say because any damn number has got cubed root.

twixt wrote:
5000 = 2^3.5^4

so if we assume that either x or y is an integer there is only one way to allocate values...

_________________

Awaiting response,

Thnx & Rgds,
Chandra

  [#permalink] 10 Sep 2004, 09:11
Display posts from previous: Sort by

ds.x^3*y ^4=5000, y =? 1) y is a positive integer 2) x is a

  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 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®.