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# Math DS questions - Help with solution

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Joined: 11 Jun 2007
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Math DS questions - Help with solution [#permalink]

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13 Jun 2007, 08:11
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Hi,
I had a couple of Data Sufficiency questions where I know the answer but not sure how to arrive at the answer.

1) Can the positive integer p be expressed as the product of two integers, each of which is greater than 1?
a) 31<p<37
b) p is odd

2) If xy=-6, what is the value of xy(x + y)?
a) x - y = 5
b) xy^2 = 18

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Manager
Joined: 19 Aug 2006
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Re: Math DS questions - Help with solution [#permalink]

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13 Jun 2007, 08:35
vidyanan wrote:
Hi,
I had a couple of Data Sufficiency questions where I know the answer but not sure how to arrive at the answer.

1) Can the positive integer p be expressed as the product of two integers, each of which is greater than 1?
a) 31<p<37
b) p is odd

2) If xy=-6, what is the value of xy(x + y)?
a) x - y = 5
b) xy^2 = 18

1) A
a) p can be 32,33,34,35,36 each can be expressed as the product of two integers
b) infinite nos,including prime also

2) D

a) To satisfy this (X,Y) is (2,-3) so Sufficiant
b) To satisfy this (X,Y) is (-3,2) so Sufficiant

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13 Jun 2007, 09:12
Thanks for the answer. The answer for the second question is actually B. I think I see how they arrived at the answer. Thanks again.

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13 Jun 2007, 09:19
B

1) x=2,y=-3 OR x=3,y=-2.
insuff

2) x=2, y=-3.
suff

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13 Jun 2007, 09:19
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# Math DS questions - Help with solution

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