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For all positive integers m, m*=3m when m is odd and

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Intern
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For all positive integers m, m*=3m when m is odd and [#permalink] New post 06 Mar 2006, 15:01
For all positive integers m, m*=3m when m is odd and m*=(1/2)m when m is even. Which of the following is uquivalent to 9* X 6*.

A. 81*
B. 54*
C. 36*
D. 27*
E. 18*

Please explain your answer. Thanks.
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 [#permalink] New post 06 Mar 2006, 16:13
D..

27* = 27 *3 = 81..


If you solve the stem you will get 3*9*1/2 *6 = 81
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 [#permalink] New post 06 Mar 2006, 16:18
81.
9* = 3 muliplied by 9(9 is odd)
6* = 1/2multiplied by 6(6 is even)
so 9* multiplied by 6* = 27 multiplied by 3 = 81.
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 [#permalink] New post 06 Mar 2006, 16:40
bewakoof wrote:
D..

27* = 27 *3 = 81..


If you solve the stem you will get 3*9*1/2 *6 = 81


I'm sorry, I don't follow. Can you please explain your answer. Thanks.
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Re: GMATPrep Question Please Help [#permalink] New post 06 Mar 2006, 17:15
D.

9* = 27 (9X3)

6* = 3 (0.5 X6)

9* X 6* = 27 X 3 = 81

or 81= 27 X 3,

So 27* = 9* X 6*


yach wrote:
For all positive integers m, m*=3m when m is odd and m*=(1/2)m when m is even. Which of the following is uquivalent to 9* X 6*.

A. 81*
B. 54*
C. 36*
D. 27*
E. 18*

Please explain your answer. Thanks.
Manager
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Joined: 24 Dec 2005
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 [#permalink] New post 07 Mar 2006, 00:28
Agree with D. This is one of those tricky ones which one can really mess up under pressure. Its a very very easy question but can really misguide anyone.

Good question Yach :)
  [#permalink] 07 Mar 2006, 00:28
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