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gmat powerprep

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by Suyog » Fri Oct 05, 2007 1:47 pm
is the question is complete?? if it is...

There are very few number which will have 'raise to 4' < 100.
As..

1, 1^4 = 1
2, 2^4 = 16
3, 3^4 = 81
and of cource 0

ans A
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by kajcha » Fri Oct 05, 2007 5:07 pm
I am lil confused.. Q is asking greatest possible value of x and there are 2 choices per option... you sure you typed the right question.
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Re: gmat powerprep

by Neo2000 » Sat Oct 06, 2007 7:26 pm
roybudhaditya wrote:X^4+Y^4=100.then the greatest possible value of x could be--

1--0 & 3.
2--6 & 9.
3--12 & 15
4--3 & 6
5-9 & 12..

Any approach???
The greatest value of X will occur when Y = 0

Therefore you get X^4 = 100

3^4 = 81 so the required number has to lie between 3 and 4

The only answer option satisfying this is D
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