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Is 5k greater than k?

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Source: — Data Sufficiency |
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by aatech » Sun May 25, 2008 6:13 pm
IMO, A

Stmt 1 -> If K is -ve, 5K will always be less than K SUFF

Stmt 2 -> 5K < 1 means K <1> K can have -ve and +ve values.. for -ve values 5K <K> K.. so NOT SUFF

OA?
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by vittalgmat » Sun May 25, 2008 8:50 pm
aatech wrote:IMO, A

Stmt 1 -> If K is -ve, 5K will always be less than K SUFF

Stmt 2 -> 5K < 1 means K <1> K can have -ve and +ve values.. for -ve values 5K <K> K.. so NOT SUFF

OA?
To explain Stmt 2:
5K <1> K <1> 5/8 which is < 1. So K <5K> -10 which is <1> 5K.
So Stmt 2 is Insufficient.

rgds
-Vittal
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by vittalgmat » Sun May 25, 2008 8:52 pm
aatech wrote:IMO, A

Stmt 1 -> If K is -ve, 5K will always be less than K SUFF

Stmt 2 -> 5K < 1 means K <1> K can have -ve and +ve values.. for -ve values 5K <K> K.. so NOT SUFF

OA?
To explain Stmt 2:
5K < 1 => K < 1. So K can be a fraction or a -ve #.
Let K = 1/8. (choose any fraction between 0 and 1/2)
So 5K => 5/8 which is < 1. So K < 5K

Let K = -2
So 5K => -10 which is < 1. Here K > 5K.
So Stmt 2 is Insufficient.

rgds
-Vittal
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by akshatsingh » Mon May 26, 2008 9:30 pm
guys..

can k take the value -1/5 ? i mean is -1/5 a negetvie number ?
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by aatech » Tue May 27, 2008 5:22 am
What's the OA?
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