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# If x is a positive interger and w is a negative integer

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If x is a positive interger and w is a negative integer [#permalink]

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16 Dec 2008, 07:01
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0% (00:00) correct 0% (00:00) wrong based on 4 sessions

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The Question is,

If x is a positive interger and w is a negative integer, what is the value of xw?

1. x^w=1/2
2. w= -1

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Re: OG QUANT DS Question 111 [#permalink]

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16 Dec 2008, 07:53
hbs2012 wrote:
The Question is,

If x is a positive interger and w is a negative integer, what is the value of xw?

1. x^w=1/2
2. w= -1

1)
x^w=1/2 -- is possible for only when x=2 and w=-1
xw=-2
statment 1 is sufficient
2) w= -1
x can be any positive integer.
not sufficient

A.
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Re: OG QUANT DS Question 111 [#permalink]

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16 Dec 2008, 08:36
What, if x is a positive interger and w is a negative, is the value of xw?

1. x^w=1/2
2. w= -1
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GT

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Re: OG QUANT DS Question 111 [#permalink]

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16 Dec 2008, 08:38
GMAT TIGER wrote:
What, if x is a positive interger and w is a negative, is the value of xw?

1. x^w=1/2
2. w= -1

1) x=4 w=-0.5
or x=2 w=-1
not suffcient

2) w=-1
not suffcient

together.
sufficient.
C.
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Re: OG QUANT DS Question 111 [#permalink]

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16 Dec 2008, 08:47
w and x are integers.

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Re: OG QUANT DS Question 111 [#permalink]

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19 Dec 2008, 11:27
gurpreet07 wrote:
is it C

Answer is A for the original question.

GMAT TIGER modified the question.. W is -negative ( not -ve integer)
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Re: OG QUANT DS Question 111 [#permalink]

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19 Dec 2008, 11:27
gurpreet07 wrote:
is it C

Answer is A for the original question.

GMAT TIGER modified the question.. W is -negative ( not -ve integer)
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Re: OG QUANT DS Question 111 [#permalink]

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28 Dec 2008, 07:18
I also got C..thanks i see the change now..its A

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Re: OG QUANT DS Question 111 [#permalink]

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28 Dec 2008, 11:40
1
KUDOS
1st is sufficient as most of us agree !

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Re: OG QUANT DS Question 111 [#permalink]

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28 Dec 2008, 13:02
yep A is suff.

X ^ W = 2 ^ -1. we can calculate xw easily.

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Re: OG QUANT DS Question 111   [#permalink] 28 Dec 2008, 13:02
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