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if denotes the greatest integer les than or equal to x, is =

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if denotes the greatest integer les than or equal to x, is = [#permalink]

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10 Aug 2009, 10:04
00:00

Difficulty:

25% (medium)

Question Stats:

84% (00:45) correct 16% (01:16) wrong based on 78 sessions

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if [x] denotes the greatest integer les than or equal to x, is [x] = 0?

1. 5x+1=3+2x
2. 0<x<1

OPEN DISCUSSION OF THIS QUESTION IS HERE: https://gmatclub.com/forum/if-denotes-t ... 94687.html
[Reveal] Spoiler: OA

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Manager
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Re: if denotes the greatest integer les than or equal to x, is = [#permalink]

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10 Aug 2009, 10:10
1) 5x + 1 = 3 + 2x
3x = 2
x = 2/3
so [x] = 0

2) 0 < x < 1
so [x] = 0

Each of the above statements are individually sufficient to answer. So answer is D

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Re: if denotes the greatest integer les than or equal to x, is = [#permalink]

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11 Jul 2011, 15:48
Statement 1: x=2/3 --> [x] = 0 ==> SUFF.
Statement 2: 0<x<1 --> [x] = 0 ==> SUFF.

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Re: if denotes the greatest integer les than or equal to x, is = [#permalink]

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13 Jul 2011, 04:55
Someone please expain the question ..did not really understand the question...

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Re: if denotes the greatest integer les than or equal to x, is = [#permalink]

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14 Jul 2011, 04:20
was expecting it to be trickier. It would have been more tricky for any value of x<0.

Ans D. 00:43 sec.
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Re: if denotes the greatest integer les than or equal to x, is = [#permalink]

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16 Jul 2011, 09:41
The only substance lies in this question is to rephrase
[x] = 0
into
x<0

& you have the answer & that is 'D'
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Re: if denotes the greatest integer les than or equal to x, is = [#permalink]

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25 Nov 2017, 08:32
Statement 1: VALUE OF X CAN BE FOUND, HENCE --> [x] = CAN BE FOUND==> SUFF.
Statement 2: 0<x<1 --> [x] = 0 ==> SUFF.

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Re: if denotes the greatest integer les than or equal to x, is = [#permalink]

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25 Nov 2017, 09:45
yezz wrote:
if [x] denotes the greatest integer les than or equal to x, is [x] = 0?

1. 5x+1=3+2x
2. 0<x<1

If [x] denotes the greatest integer less than or equal to x, is [x] = 0 ?

Here $$x$$ is not said to be an integer. Stem defines some function, represented by the symbol $$[]$$, as the function which rounds down any number to an integer value:

$$[3.4]=3$$, $$[2]=2$$, $$[-7.5]=-8$$, ...

Q: is $$[x]=0$$? Or is $$0\leq{x}<1$$?

(1) 5x + 1 = 3 + 2x --> $$x=\frac{2}{3}$$ --> $$[\frac{2}{3}]=0$$. Sufficient.

(2) 0 < x < 1 --> any $$x$$ from this range will round down to 0, so $$[x]=0$$. Sufficient.

Hope it helps.

OPEN DISCUSSION OF THIS QUESTION IS HERE: https://gmatclub.com/forum/if-denotes-t ... 94687.html
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Re: if denotes the greatest integer les than or equal to x, is =   [#permalink] 25 Nov 2017, 09:45
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