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# Symbol denotes the least integer greater than or equal to d,

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Director
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Symbol denotes the least integer greater than or equal to d, [#permalink]

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12 Jun 2007, 02:44
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Symbol [d] denotes the least integer greater than or equal to d, is [2d]=0?
1). [d]=0
2). [3d]=0

OA later.
Senior Manager
Joined: 04 Jun 2007
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12 Jun 2007, 02:57
stmt 1: [d]=0 => -1< d <= 0. insufficient. (-2 < 2d <=0)

stmt 2: [3d]=0 => -1/3 < d <=0. sufficient. (-2/3 < 2d <= 0)

Director
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12 Jun 2007, 07:10
Think its D, but not sure.

Rewrote the question to say x instead of [d]. So.. x >= d

So x = 0 then d = 0 (Since we said x is the least possible int to make x>= d true, so equal) and 2(0) = 0. Suff.

and 3x = 0 so x = 0 then 2(0) = 0. Suff.

OA?
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12 Jun 2007, 11:26
I think It is C.

using 1 we get d > 0 or d = 0
using 2) we get [3d] = 0 means d >0 or d = 0

so if we take both 1 and 2 it says d = 0
12 Jun 2007, 11:26
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