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# What is the value of │x + 7│?

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Intern
Joined: 08 May 2006
Posts: 19
What is the value of │x + 7│? [#permalink]

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18 Aug 2006, 22:58
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Question Stats:

67% (02:04) correct 33% (01:13) wrong based on 2 sessions

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What is the value of │x + 7│?
(1) │x + 3│= 14
(2) (x + 2)^2 = 169

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. Answer:
Manager
Joined: 15 Jul 2005
Posts: 105

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18 Aug 2006, 23:26
(C) both statetments are required.

|x+7|=?

(1) |x+3|=14
x+3 could be 14 or -14, yielding x = 11 or -17. insufficient.

(2) (x+2)^2 = 169
(x+2)^2 = 13^2 or -13^2
x=11 or -15. insufficient.

together they are sufficient.
CEO
Joined: 20 Nov 2005
Posts: 2894
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008

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19 Aug 2006, 02:56
chets wrote:
(C) both statetments are required.

|x+7|=?

(1) |x+3|=14
x+3 could be 14 or -14, yielding x = 11 or -17. insufficient.

(2) (x+2)^2 = 169
(x+2)^2 = 13^2 or -13^2
x=11 or -15. insufficient.

together they are sufficient.

Easy one. Exactly same approach.
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

19 Aug 2006, 02:56
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