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Are positive integers P , Q , and R equal? 1. P = Q 2. Q^2 =

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Intern
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Are positive integers P , Q , and R equal? 1. P = Q 2. Q^2 = [#permalink] New post 06 Nov 2009, 14:30
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A
B
C
D
E

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Are positive integers P , Q , and R equal?

1. P = Q
2. Q^2 = R^2




***********************************************************
please explain
VP
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Re: P Q and R [#permalink] New post 06 Nov 2009, 16:14
amitgovin wrote:
Are positive integers P , Q , and R equal?

1. P = Q
2. Q^2 = R^2




***********************************************************
please explain



answer c.

1. p = q we know nothing about r so insufficient
2. we know nothing about p so insufficient

together yes..the answer would be no if one can be a negative but the question states they are all positive

q^2 = r^2 q and r are positive so the numbers are the same..and p = q so they are all the same
Senior Manager
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Re: P Q and R [#permalink] New post 07 Nov 2009, 10:50
I guess [C] is the only way to answer a Yes/No..
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Re: P Q and R [#permalink] New post 15 Nov 2009, 05:21
C, very easy unless somebody says there's a trick in this question.
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Re: P Q and R [#permalink] New post 15 Nov 2009, 05:56
Statement 1:
P=Q

We have no idea what the value of R is.

INSUFFICIENT

Statement 2:
Q^2 = R^2

We have no idea what the value of P is

INSUFFICIENT

Statement 1 and 2:

Because the problem states that the P, Q, and R are positive integers, we know that Q and R are positive integers.

Because we know the value of Q we must also know the value of P.

SUFFICIENT

(Note that Q^2 = R^2 would have made this INSUFFICIENT if the problem had not specifically mentioned that we were dealing with positive integers)

ANSWER: C.
Re: P Q and R   [#permalink] 15 Nov 2009, 05:56
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Are positive integers P , Q , and R equal? 1. P = Q 2. Q^2 =

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