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necromonger
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Q. What is the product of P and Q? (A) P = 19/xy (B) Q = 06 Aug 2006, 08:10
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Q. What is the product of P and Q?

(A) P = 19/xy
(B) Q = 13xy

I'll give the OA after I see the replies. While at the outset it seemed straight forward, I have a nagging feeling about it.



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XxxyyY
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Q. What is the product of P and Q? (A) P = 19/xy (B) Q = 06 Aug 2006, 13:06
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-C-

I'm getting 247.


(P)(Q)=(19/xy)(13xy/1)=247
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heman
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Q. What is the product of P and Q? (A) P = 19/xy (B) Q = 06 Aug 2006, 13:21
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necromonger
Q. What is the product of P and Q?

(A) P = 19/xy
(B) Q = 13xy

I'll give the OA after I see the replies. While at the outset it seemed straight forward, I have a nagging feeling about it.
Show more


I can see the trick in this Q but I am going to mess up anyway.

P,Q={ I,+,-,0,+-1/2,+-sqrt(2)}

(1) P= 19/xy
No info about Q
BCE
(2) Q =13xy
No info about P
CE
(1)&(2)
PQ=19*13 suff if xy =1
I am thinking if xy=0 then PQ would be 0/0 indeterminate but xy cannot be 0 since in statement (1) P is defined in GMAT land.

Hence C
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necromonger
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Q. What is the product of P and Q? (A) P = 19/xy (B) Q = 06 Aug 2006, 15:04
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I figured 'C' should be the answer (simple to get there) but got stumped as I began to think - what if x or y or both are 0?

But looking at Heman's explanation - if P = <expression> then P has to be a legitimate value, which it cannot be if x or y are 0. That solves the problem.

So is it guaranteed in GMAT that if a value is assigned (like P = something). then P CANNOT be indeterminate? (in a situation where the stem does not specify range of x or y). Somehow i'm still not very convinced.

BTW OA is (C)
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Q. What is the product of P and Q? (A) P = 19/xy (B) Q = 06 Aug 2006, 15:26
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Necro,

Have you been studying too hard?:) This seems like a pretty straight forward question even for a gmat dummy like me and you are always right..99% of the time. Don't start doubting yourself:)

HJim :l
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Q. What is the product of P and Q? (A) P = 19/xy (B) Q = 07 Aug 2006, 08:21
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necromonger

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I'll give the OA after I see the replies. While at the outset it seemed straight forward, I have a nagging feeling about it.
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necromonger: ur nagging feeling is the right one to have. It is always very important to check for 0/0 indeterminate condition. In this problem because of statement(1) xy=0 is not possible

check this link where your thought about 0/0 does come true:
https://www.gmatclub.com/phpbb/viewtopic ... highlight=


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necromonger
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Q. What is the product of P and Q? (A) P = 19/xy (B) Q = 07 Aug 2006, 09:40
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Thanks guys, it's all clear now :)



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This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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