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# y is odd, x^3*y^4=5000, what is y? 1) x is integer 2) y >

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Director
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y is odd, x^3*y^4=5000, what is y? 1) x is integer 2) y > [#permalink]

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28 Oct 2005, 06:35
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y is odd, x^3*y^4=5000, what is y?

1) x is integer
2) y > 0
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Auge um Auge, Zahn um Zahn !

Manager
Joined: 05 Oct 2005
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28 Oct 2005, 07:05
gamjatang wrote:
y is odd, x^3*y^4=5000, what is y?

1) x is integer
2) y > 0

First, break this down into the prime factors:
5, 5, 5, 5, 2, 2, 2

1) Since we know that x is an integer, then y, which is an odd integer, can be either 5 or -5. X must be 2. Insufficient

2) This statement doesn't tell us that x must be an integer, so Y could be any odd number. Insufficient

Together, we know that x=2 and y=5.

Manager
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28 Oct 2005, 13:53
good one BumblebeeMan. C for me too!

BumblebeeMan wrote:
gamjatang wrote:
y is odd, x^3*y^4=5000, what is y?

1) x is integer
2) y > 0

First, break this down into the prime factors:
5, 5, 5, 5, 2, 2, 2

1) Since we know that x is an integer, then y, which is an odd integer, can be either 5 or -5. X must be 2. Insufficient

2) This statement doesn't tell us that x must be an integer, so Y could be any odd number. Insufficient

Together, we know that x=2 and y=5.

Re: DS - integer   [#permalink] 28 Oct 2005, 13:53
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