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Question 6 (nov.24th)

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by bacali » Mon Nov 24, 2008 11:41 am
Q13:

What is the value of the integer n?
(1) n(n + 2) = 15
(2) (n + 2)^n = 125


OA: B
Last edited by bacali on Tue Nov 25, 2008 7:35 am, edited 1 time in total.
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Source: — Data Sufficiency |
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by cramya » Mon Nov 24, 2008 12:44 pm
Please post the correct question.

Stmt I)

n(n+2) = 15
n^2+2n-15=0

n=-5 n=3

2 different solutions

INSUFF

Stmt II

(n+2)^n = 125

n has to be 3 for the above to be true.

SUFF

B)
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by mals24 » Mon Nov 24, 2008 12:46 pm
Im not getting any answer.

St 1 will give 2 values for n, 3 and -5
St 2 won't give you any integers as n , which is kind of going against what is given in the question. So I guess you have made a typo in option B.

Can you double check the question???
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by niraj_a » Mon Nov 24, 2008 12:48 pm
whew, thanks cramya, i was losing it trying to find factors of 125 that had a diff of 2.
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by mals24 » Mon Nov 24, 2008 12:49 pm
Thanks for the correction cramya

Ok if option B is (n-2)^n = 125

(n-2)n = 5^3
n=3

Answer is B.
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by cramya » Mon Nov 24, 2008 6:47 pm
No probs!
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by bacali » Tue Nov 25, 2008 7:36 am
Hey, sorry guys it didn't copy over correctly. I've corrected the error.


Thanks again cramya. You're priceless to this forum.
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