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ps 19

by dunkin77 » Sun Jun 17, 2007 8:56 am
If y is an integer and y = lXl + x, is y = 0?
(1) x < 0
(2) y < 1



I was for A but the answer is D. How can we answer the question that is asking if Y = 0 with 2) y<1 ?? because the answer is no to the question?
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by RM » Sun Jun 17, 2007 10:42 am
This a yes-no ques, statement 2 states y < 1 that implies Y is NOT equal to 0. Thus statement 2 is also able to answer the question.

Answer D.
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by dunkin77 » Sun Jun 17, 2007 12:49 pm
Okay thanks for your help. :)
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Re: ps 19

by jayhawk2001 » Sun Jun 17, 2007 1:59 pm
dunkin77 wrote:If y is an integer and y = lXl + x, is y = 0?
(1) x < 0
(2) y < 1
We know y can be either positive or 0, depending on the value of x.
i.e. if x is positive, y = 2x and if x is negative, y = 0.

(2) tells us that y is an integer and y < 1. So, only possibility is y = 0.
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