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

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Intern
Joined: 06 Jan 2008
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For all positive integers m, m = 3m when m is odd and m = [#permalink]  15 Jan 2008, 19:09
For all positive integers m, m = 3m when m is odd and m = 1/2m when m is even. Which of the following is equivalent to 9 X 6?

a. 81
b. 54
c. 36
d. 27
e. 18
Manager
Joined: 16 Dec 2007
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Schools: Kellogg (R2), UCLA (R2)
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Re: GMATPREP question # 3 [#permalink]  15 Jan 2008, 19:20
For all positive integers m, m = 3m when m is odd and m = 1/2m when m is even. Which of the following is equivalent to 9 X 6?

a. 81
b. 54
c. 36
d. 27
e. 18

9 is odd so 9 =9*3=27
6 is even so 6 =6/2=3

SVP
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Re: GMATPREP question # 3 [#permalink]  15 Jan 2008, 19:29
81, same approach as above
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Re: GMATPREP question # 3 [#permalink]  15 Jan 2008, 19:33
For all positive integers m, m = 3m when m is odd and m = 1/2m when m is even. Which of the following is equivalent to 9 X 6?

a. 81
b. 54
c. 36
d. 27
e. 18

I think ive seen this before. I think we are suppose to express the answer in _ thus D would be the answer.
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Re: GMATPREP question # 3 [#permalink]  15 Jan 2008, 20:13
the right answer is D, and i can't fully understand how they came up with that answer. I choose A like you guys, but it was wrong.
Manager
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Re: GMATPREP question # 3 [#permalink]  16 Jan 2008, 11:23
the right answer is D, and i can't fully understand how they came up with that answer. I choose A like you guys, but it was wrong.

I initially got D. If you have to express it in _ numbers than its 27. As 81 is a odd number
_81 =81/3=27
Re: GMATPREP question # 3   [#permalink] 16 Jan 2008, 11:23
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