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# If d is a positive integer, is SQRT(15) greater than 15?

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Senior Manager
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If d is a positive integer, is SQRT(15) greater than 15?  [#permalink]  05 Dec 2003, 05:49
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If d is a positive integer, is SQRT(15) greater than 15?

(I) d is divisible by 25
(II) d is divisible by 40
CEO
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Re: PS - SQRT [#permalink]  05 Dec 2003, 05:54
MartinMag wrote:
If d is a positive integer, is SQRT(15) greater than 15?

(I) d is divisible by 25
(II) d is divisible by 40

whats the relation of d to the question..?
Manager
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I reckon you mean is SQRT(d) greater than 15?

(1) d can be any multiple of 25 (25, 50, 75, and so on)
(2) d can be any multiple of 40 (40, 80, 120)
(combined) d has to be a multiple of 200. But even then we don't know if it's 400, 1600 or any other multiple of 200 that is a perfect square.
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'd' could be =200 (SQRT=14.1<15) or 400 (SQRT=20>15)
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