If absolute(n+5) = 5, what is the value of n? (1) n^2 is not

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If absolute(n+5) = 5, what is the value of n? (1) n^2 is not [#permalink]

15 Mar 2010, 12:46

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If absolute(n+5) = 5, what is the value of n?

(1) n^2 is not equal to 0.
(2) n^2 + 10n = 0

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Re: Modulus [#permalink]

15 Mar 2010, 12:53

abhi758 wrote:

If absolute(n+5) = 5, what is the value of n?

(1) n^2 is not equal to 0.
(2) n^2 + 10n = 0

will go with A

stmnt1 - we have n^2 is not equal to 0

from question stem we have | n+5| = 5 so n = 0 or -10. n is not 0 so n will be -10. hence suff

stmnt2 - n^2 + 10n = 0 => n(n+10) = 0 so n = 0 or -10. both these values satisfy the condition as given in question stem. hence insuff

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Re: Modulus [#permalink]

15 Mar 2010, 12:59

abhi758 wrote:

If absolute(n+5) = 5, what is the value of n?

(1) n^2 is not equal to 0.
(2) n^2 + 10n = 0

|n+5| = 5 => n+5 = 5 and -n-5 = 5
=> n = 0 or n = -10

stmt1: n^2 is not equal to 0 means n <> 0 hence n = -10 so suff

stmt2:n^2+10n = 0 => n = 0 or n = -10 not suff to answer the value of n
Hence A stmt 1 is suff
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Re: Modulus [#permalink] 15 Mar 2010, 12:59

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If absolute(n+5) = 5, what is the value of n? (1) n^2 is not

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If absolute(n+5) = 5, what is the value of n? (1) n^2 is not

If absolute(n+5) = 5, what is the value of n? (1) n^2 is not

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