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If [x] is the greatest integer less than or equal to x, what

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If [x] is the greatest integer less than or equal to x, what [#permalink] New post 17 Dec 2012, 09:02
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If [x] is the greatest integer less than or equal to x, what is the value of [-1.6]+[3.4]+[2.7]?

(A) 3
(B) 4
(C) 5
(D) 6
(E) 7
[Reveal] Spoiler: OA
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Re: If [x] is the greatest integer less than or equal to x, what [#permalink] New post 17 Dec 2012, 09:06
Walkabout wrote:
If [x] is the greatest integer less than or equal to x, what is the value of [-1.6]+[3.4]+[2.7]?

(A) 3
(B) 4
(C) 5
(D) 6
(E) 7


Some function [] rounds DOWN a number to the nearest integer. For example [1.5]=1, [2]=2, [-1.5]=-2, ...

Thus [-1.6]+[3.4]+[2.7]=-2+3+2=3.

Answer: A.

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Re: If [x] is the greatest integer less than or equal to x, what [#permalink] New post 17 Dec 2012, 09:28
You are asked what the closest lesser integer value to [x] is.

[-1.6] = -2.0
[3.4] = 3.0
[2.7] = 2.0

Therefore , answer is: -2.0 + 3.0 + 2.0 = 3.0

Option A.
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Re: If [x] is the greatest integer less than or equal to x, what [#permalink] New post 18 Dec 2012, 00:53
[-1.6] = -2
[3.4] = 3
[2.7] = 2

-2 + 3 + 2 = 3

Answer: A
Re: If [x] is the greatest integer less than or equal to x, what   [#permalink] 18 Dec 2012, 00:53
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