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# If x^3y^4=5,000, is y=5? (1)y is a positive integer. (2)x is

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Intern
Joined: 08 Nov 2008
Posts: 38

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If x^3y^4=5,000, is y=5? (1)y is a positive integer. (2)x is [#permalink]

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19 Nov 2008, 15:53
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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.

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SVP
Joined: 29 Aug 2007
Posts: 2472

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28 Nov 2008, 13:40
gorden wrote:
If x^3 y^4=5,000, is y=5?

(1) y is a positive integer.
(2) x is an integer.

(x^3) (y^4) = 5,000,

5,000 = (2x2x2) (5x5x5x5) but 5 could be -ve where as 2 cannot be.

1: y could be 1 or 5. nsf......
2: x is any +ve integer. nsf..

1&2: We know that x and y are integers and y is +ve as well, y must be 5.

So it is C.
_________________

Gmat: http://gmatclub.com/forum/everything-you-need-to-prepare-for-the-gmat-revised-77983.html

GT

Kudos [?]: 841 [0], given: 19

Re: x,y intergers-25   [#permalink] 28 Nov 2008, 13:40
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