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dunkin77
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 Posted: Sun Jun 17, 2007 8:56 am Post subject: ps 19 |
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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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RM
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| Posted: Sun Jun 17, 2007 10:42 am Post subject: |
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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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dunkin77
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| Posted: Sun Jun 17, 2007 12:49 pm Post subject: |
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Okay thanks for your help.  |
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jayhawk2001
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| Posted: Sun Jun 17, 2007 1:59 pm Post subject: Re: ps 19 |
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| dunkin77 wrote: | If y is an integer and y = lXl + x, is y = 0?
(1) x < 0
(2) y < 1
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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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