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one important property

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one important property

by arora007 » Tue Jul 06, 2010 2:49 am
If |x| < 4 , what is the value of x ?

1. x is an integer divisible by 3
2. x is an integer divisible by 2

[spoiler]

One important property one must remember is

Zero is divisible by all numbers except itself.

OA - C
[/spoiler]
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Source: — Data Sufficiency |
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by kvcpk » Tue Jul 06, 2010 2:59 am
|x| < 4 means x lies between -4 and 4 on number line.

x is an integer divisible by 3

-3,3,0 - these three are divisible.. Hence INSUFFICIENT

x is an integer divisible by 2

-2,0,2 - these three are divisible by2 .. Hence INSUFICIENT

Combining:

only 0 is divisible by both 2 and 3.

pick C
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by sanju09 » Tue Jul 06, 2010 4:39 am
kvcpk wrote:|x| < 4 means x lies between -4 and 4 on number line.

x is an integer divisible by 3

-3,3,0 - these three are divisible.. Hence INSUFFICIENT

x is an integer divisible by 2

-2,0,2 - these three are divisible by2 .. Hence INSUFICIENT

Combining:

only 0 is divisible by both 2 and 3.

pick C
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