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Q4

Expert replies
Source: — Data Sufficiency |

by cramya » Sat Nov 29, 2008 10:04 pm
Fractions are the best bet for this problem since it says x/y are positive but not positive integers

Stmt I

x=9 y=2
sqrt(9) = 3 > 2 and x^3>y YES

x=1/4 y=1/3

sqrt(x) > 1/3 but x>y NO

insuff

Stmt II

3 > 2

3^3>y YES

1/2 > 1/3

1/2^3 > 1/3 NO

INSUFF

Stmt I and II together

x=9 y=2

sqrt(9) > 2 and 9>2 and 9^3 > 2 YES

x=1/4 y=1/5

x>y and sqrt(x) > y but IS x^3 = 1/4^3 > 1/5 -> NO

E)
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Re: Q4

by logitech » Sat Nov 29, 2008 10:08 pm
bacali wrote:OA E
bacali next time you see problem like this in which:

1) x and y are positive
2) and X and Y have no numbers preceding them

Make sure that you use:

An integer that is greater than 1
An integer that is between 0 and 1: choose 1/2

because between 0 and 1 math and numbers act crazy! ;-)
LGTCH
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"DON'T LET ANYONE STEAL YOUR DREAM!"
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Re: Q4

by bacali » Sun Nov 30, 2008 7:02 am
logitech wrote:
bacali wrote:OA E
bacali next time you see problem like this in which:

1) x and y are positive
2) and X and Y have no numbers preceding them

Make sure that you use:

An integer that is greater than 1
An integer that is between 0 and 1: choose 1/2

because between 0 and 1 math and numbers act crazy! ;-)
Nice! Thanks a lot logitech.
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