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

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x^3*y^4 = 2000 . What is y? 1. x is an integer 2. y is an [#permalink]  02 Sep 2008, 02:01
$$x^3*y^4 = 2000$$ . What is y?

1. x is an integer
2. y is an intege
SVP
Joined: 17 Jun 2008
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Re: WHAT is Y? [#permalink]  02 Sep 2008, 02:24
C. If both x and y are integers then 5^3*2^4 = 2000. Hence, sufficient.
Manager
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Re: WHAT is Y? [#permalink]  02 Sep 2008, 02:51
arjtryarjtry wrote:
$$x^3*y^4 = 2000$$ . What is y?

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

factor 2000 into primes
$$2000 = 2^4 * 5^3$$

HOWEVER,
$$2000 = -2^4 * 5^3$$

neihter of hte statements tell whether x = 2 or -2

therefore E
Senior Manager
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Re: WHAT is Y? [#permalink]  02 Sep 2008, 03:25
Good question. Fell for that trap, too. Must take another coffee...
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Re: WHAT is Y? [#permalink]  02 Sep 2008, 04:11
Oops....realized the trap.....I should not be in a hurry for answer.
Re: WHAT is Y?   [#permalink] 02 Sep 2008, 04:11
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