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x a multiple of y

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x a multiple of y

by shibal » Tue Jun 30, 2009 6:15 pm
If x and y are integers greater than 1, is x a multiple of y?
a. 3y2 + 7y = x
b. x2 – x is a multiple of y
oa A
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by aj5105 » Tue Jun 30, 2009 7:32 pm
For 1), x=3y^2+7y=y*(3y+7), x must be a multiple of y

For 2), x^2-x=x(x-1) is multiple of y, does not mean that x is a multiple of y.

(A)
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by ssmiles08 » Tue Jun 30, 2009 7:36 pm
https://www.beatthegmat.com/help-with-qu ... tml#156829
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