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Question from Challenge 6

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CEO
CEO
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Joined: 15 Aug 2003
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Kudos [?]: 928 [0], given: 781

Question from Challenge 6 [#permalink]

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New post 22 Feb 2006, 07:37
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Thanks for answering the last question. Here one of three questions i am posting today. Please explain your answer choice.

What is the least possible value of x?

(1) x^2 - 5x + 5 = 1 - x
(2) x^2 = 4
(A) Statement (1) ALONE is sufficient, but Statement (2) alone is not sufficient.
(B) Statement (2) ALONE is sufficient, but Statement (1) alone is not sufficient.
(C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
(D) EACH statement ALONE is sufficient.
(E) Statements (1) and (2) TOGETHER are NOT sufficient.

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Director
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New post 22 Feb 2006, 08:53
(1) x^2 - 5x + 5 = 1 - x

(x-2)^2=0

x=2 v x=-2

(2) x^2 = 4
x=2 v x=-2

both statements lead to x=-2 as the least possible value of x

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Director
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Location: NYC
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New post 22 Feb 2006, 16:07
I believe D..
It is asking for least possible value.. and least possible value can be -2
_________________

Success is my only option, failure is not -- Eminem

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Manager
Manager
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 [#permalink]

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New post 22 Feb 2006, 17:18
Agree with D.

What is the least possible value of x?

(1) x^2 - 5x + 5 = 1 - x
(2) x^2 = 4

i] x^2 - 5x + 5 = 1 - x
=> (x-2)^2=0
so x=2 ----suff

ii] x^2 = 4
=> (x-2)(x+2)=0
so x=-2,2 since -2 is smaller it is the least value here - suff

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Manager
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Location: Colombia, South America
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New post 22 Feb 2006, 17:32
good question, is not really testing math but how much you understand the tricks of the GMAT, I'll go with D as well

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Senior Manager
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New post 22 Feb 2006, 20:25
1) (x-2)^2 = 0 => x= +- 2
2) x^2=4 =>x= +- 2

both are sufficient so answer is D

Chirag

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New post 22 Feb 2006, 20:39
Guys,
I too agree with D.
But, the least possible value from statement(1) is 2 (and not +/-2).
(x-2)^2 = 0 => x = 2 only.

Kudos [?]: 21 [0], given: 0

  [#permalink] 22 Feb 2006, 20:39
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Question from Challenge 6

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