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For every X, the action [X] is defined: [X] is the greatest integer le

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For every X, the action [X] is defined: [X] is the greatest integer le  [#permalink]

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New post 07 Jun 2016, 07:25
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

81% (01:49) correct 19% (02:01) wrong based on 86 sessions

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Re: For every X, the action [X] is defined: [X] is the greatest integer le  [#permalink]

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New post 07 Jun 2016, 07:32
1
[6.5] x [2/3] + [2] x 7.2 + [8.4] - 6.6
= 6*0 + 2*7.2 + 8 - 6.6
= 0 +14.4 +1.4
15.8
Answer C
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Re: For every X, the action [X] is defined: [X] is the greatest integer le  [#permalink]

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New post 07 Jun 2016, 09:07
Bunuel wrote:
For every X, the action [X] is defined: [X] is the greatest integer less than or equal to X. What is the value of [6.5] x [2/3] + [2] x 7.2 + [8.4] - 6.6?

A. 12.6.
B. 14.4.
C. 15.8.
D. 16.2.
E. 16.4.



We do not have to work on entire calculations by working just on decimals...
As rest all are integers, we are looking for [2]*7.2-6.6 = 14.4 - 6.6.....so the tenths decimal place has to be 01.4-0.6 which will be 0.8..
Only C has 8 at tenths decimal place
ans 15.8
C
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Re: For every X, the action [X] is defined: [X] is the greatest integer le  [#permalink]

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New post 09 Aug 2017, 09:23
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Re: For every X, the action [X] is defined: [X] is the greatest integer le   [#permalink] 09 Aug 2017, 09:23
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