x^3*y^4 = 2000. What is y? 1. x is an integer 2. y is an

Oldest

Best Reply

Author

Message

TAGS:

SVP

Joined: 04 May 2006

Posts: 1946

Schools: CBS, Kellogg

Followers: 10

Kudos [?]: 168 [0], given: 1

x^3*y^4 = 2000. What is y? 1. x is an integer 2. y is an [#permalink]

14 May 2008, 02:19

x^3*y^4 = 2000. What is y?

1. x is an integer
2. y is an integer
_________________

Find out what's new at GMAT Club - latest features and updates

Last edited by sondenso on 14 May 2008, 03:09, edited 2 times in total.

Manager

Joined: 21 Feb 2008

Posts: 71

Followers: 1

Kudos [?]: 17 [0], given: 1

Re: M12- [#permalink]

14 May 2008, 02:35

factorise 2000

2*1000
2*2*500
.
.
try cracking down to all primes
.
.
2*2*2*2*5*5*5

(2^4)*(5^3)=2000
_________________

Is this okay?

Manager

Joined: 11 Apr 2008

Posts: 157

Schools: Kellogg(A), Wharton(W), Columbia(D)

Followers: 1

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

Re: M12- [#permalink]

14 May 2008, 02:43

sondenso wrote:

x^3*y^4 = 2000. What is y?

x is an integer
y is an integer

Is it a PS question? Or is it DS ?

Anyways =>
if it is PS,
2000= 2* 10* 10* 10=> 2* 5*2*5*2*5*2 => 5^3 * 2^4 .
Seems to be the only possibility when both x and y are integers.

If it is DS =>
Stt1 : x is an integer => x could be 10 =>
and => x^3 = 1000 => y is not an integer but y=2^(1/4)
but, x = 5 => y = 2
SO, Y cannot be found.
Statement 2 => y is an integer => could be several values again as X is not an integer.

Both togehter STT1 + STT2 => x=5 and y=2 is the only possibility.
So, IMO - C.

Ciao

SVP

Joined: 04 May 2006

Posts: 1946

Schools: CBS, Kellogg

Followers: 10

Kudos [?]: 168 [0], given: 1

Re: M12- [#permalink]

14 May 2008, 03:10

C is my choice and C is not OA!
_________________

Find out what's new at GMAT Club - latest features and updates

Current Student

Joined: 28 Dec 2004

Posts: 3439

Location: New York City

Schools: Wharton'11 HBS'12

Followers: 11

Kudos [?]: 134 [0], given: 2

Re: M12- [#permalink]

14 May 2008, 05:11

I believ this is E..

y can be +-2

Manager

Joined: 11 Apr 2008

Posts: 157

Schools: Kellogg(A), Wharton(W), Columbia(D)

Followers: 1

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

Re: M12- [#permalink]

15 May 2008, 05:37

fresinha12 wrote:

I believ this is E..

y can be +-2

Technically speaking you seem to be completely correct.
But somehow... I think we still may be missing someting here.
Can't tell what !!

SVP

Joined: 04 May 2006

Posts: 1946

Schools: CBS, Kellogg

Followers: 10

Kudos [?]: 168 [0], given: 1

Re: M12- [#permalink]

15 May 2008, 20:45

fresinha12 wrote:

I believ this is E..

y can be +-2

Thanks fresinha12, you are right, E is OA
_________________

Find out what's new at GMAT Club - latest features and updates

Re: M12- [#permalink] 15 May 2008, 20:45

	Similar topics	Author	Replies	Last post
Similar Topics:	y is odd, x^3*y^4=5000, what is y? 1) x is integer 2) y >	gamjatang	2	28 Oct 2005, 06:35
	x^3(y^4)=2000 What is y? 1. X is an integer 2. Y is an	bmwhype2	7	26 Nov 2007, 15:06
	x^3*y^4=2000.What is y? 1. x is an integer 2. y is an	marcodonzelli	7	16 Feb 2008, 10:09
	x^3*y^4 = 2000 . What is y? 1. x is an integer 2. y is an	arjtryarjtry	4	02 Sep 2008, 03:01
	If x and y are positive integers and x^3*y^4 = 2000 what is	IgnitedMind	1	11 Sep 2008, 14:36

x^3*y^4 = 2000. What is y? 1. x is an integer 2. y is an

Main navigation

GMAT Resources

Partners

MBA Resources

GMAT ® is a registered trademark of the Graduate Management Admission Council ® (GMAC ®). GMAT Club's website has not been reviewed or endorsed by GMAC.

GMAT Courses

Admissions Consulting

x^3*y^4 = 2000. What is y? 1. x is an integer 2. y is an

x^3*y^4 = 2000. What is y? 1. x is an integer 2. y is an

Main navigation

GMAT Resources

Partners

MBA Resources