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GPrep2 -Absolute value

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Source: — Data Sufficiency |
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Re: GPrep2 -Absolute value

by gabriel » Sun Nov 18, 2007 6:57 am
1st is insufficient as eg if y=1 , other than 3 x can take any value ..

2nd is sufficient .. y is >=0 , so -y will have to be equal to 0 or < 0 .. but a mod cannot be less than or equal to any negative value, so y has to be 0 and mod(x-3) has to be equal to 0 so x =3 .. hence the answer is B

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by ri2007 » Sun Nov 18, 2007 7:16 am
Hey Gabriel

thanks a lot. Thats a great explaination
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