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Inequality of X

Expert replies
Source: — Data Sufficiency |

by Anurag@Gurome » Mon Jan 09, 2012 9:00 pm
karthikpandian19 wrote:If x is not equal to 0, is |x| less than 1?

(1) x/|x| < x
(2) |x| > x
Statement 1: x/|x| < x
For x = 2, x/|x| = 1 < 2 ----> No
For x = -0.5, x/|x| = -1 < -0.5 ----> Yes

Not sufficient

Statement 2: |x| > x
For x > 0, |x| = x and for x < 0, |x| = -x > x
Hence, x must be negative but |x| may or may not be less than 1.

Not sufficient

1 & 2 Together: x is negative and x/|x| < x
As x is negative, |x| = -x
Hence, x/|x| = -1
Hence, x > -1
Hence, |x| < 1

Sufficient

The correct answer is C.
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
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by [email protected] » Fri Jan 20, 2012 11:38 pm
What is basically asked is "Is x < 0"
The correct answer is C

Explanation:.
Statement 1:
the statement 1 is saying that
x/|x| < x means that x is definitely negative but x is between 0 and -1 so the inequality is as follows :
-1 <x<0 but individually insufficient

Statement 2:
this statement always means the same thing as x<0
Again individually insufficient


Both combined:
x<0 is what is the common factor from both the statements...

Hope this helps in understanging!!!
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