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by gabriel » Fri Nov 16, 2007 2:23 am
What is the value of |x|?

(1) |x2 + 16| – 5 = 27

(2) x2 = 8x – 16
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Source: — Data Sufficiency |
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by moneyman » Fri Nov 16, 2007 2:39 am
Is the answr B??
Maxx
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by ri2007 » Fri Nov 16, 2007 5:16 am
The Ans should be D

Statement 1) Gives two values of X^2, one is 16 and the other is -48. Since X^2 cannot be negative, the only solution is lXl = 4

Statement 2) Straightforward lXl = 4

Pls confirm if my thinking is correct. Thanks
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by gabriel » Sat Nov 17, 2007 6:46 am
ri2007 wrote:The Ans should be D

Statement 1) Gives two values of X^2, one is 16 and the other is -48. Since X^2 cannot be negative, the only solution is lXl = 4

Statement 2) Straightforward lXl = 4

Pls confirm if my thinking is correct. Thanks
excellent .. that is the answer .. i posted the question because of the trap in the first choice, which many people tend to ignore
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