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What is the value of n in the equation: -25+19+n=s

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What is the value of n in the equation: -25+19+n=s [#permalink] New post 21 Apr 2008, 03:23
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82% (01:36) correct 18% (00:11) wrong based on 34 sessions
What is the value of n in the equation -25 + 19 + n = s ?

(1) s = 2
(2) \frac{n}{s} = 4
[Reveal] Spoiler: OA
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Re: DS [#permalink] New post 21 Apr 2008, 06:35
dishant007 wrote:
What if s=0?


s can't be zero in this question because n/s =4, which is defined.
if s =0, n/s would be infinity, which is not the case here.
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Re: DS [#permalink] New post 21 Apr 2008, 18:59
vshaunak@gmail.com wrote:
dishant007 wrote:
What if s=0?


s can't be zero in this question because n/s =4, which is defined.
if s =0, n/s would be infinity, which is not the case here.


Good question,
The same to me, we are falling in the trap. I wonder why it is easy, but it still be posted here? And I found the trap very interesting. Worthy to know it!

When we assume n/s =4 that n = 4s, the condition attached to it must be s is not zero. But nobody tell us that s is none zero. So it is not sufficient to solve!

Interesting!
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Re: DS   [#permalink] 21 Apr 2008, 18:59
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What is the value of n in the equation: -25+19+n=s

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