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Question from GMATprep

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mbiasol
 Post subject: Question from GMATprep
 Post Posted: Sun Oct 02, 2011 6:18 am 
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Students


Posts: 1
I'm stuck with this question... it looks so easy but I can't solve it

For all positive integers m, [m] = 3m when m is odds and [m] = 1/2m when m is even
Which of the following is equivalent to [9]x[6]?

I answered 81...
[9] = 3*9 = 27
[6] = 6/2 = 3
27*3 = 81

The right answer is 27 .... The only way to obtain this value is to consider:
[9]x[6] = [81] = [3*m] => m = 27
By the way the question asks to give a value to [9]x[6] ...
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jnelson0612
 Post subject: Re: Question from GMATprep
 Post Posted: Sat Oct 29, 2011 11:49 pm 
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ManhattanGMAT Staff


Posts: 1857
mbiasol wrote:
I'm stuck with this question... it looks so easy but I can't solve it

For all positive integers m, [m] = 3m when m is odds and [m] = 1/2m when m is even
Which of the following is equivalent to [9]x[6]?

I answered 81...
[9] = 3*9 = 27
[6] = 6/2 = 3
27*3 = 81

The right answer is 27 .... The only way to obtain this value is to consider:
[9]x[6] = [81] = [3*m] => m = 27
By the way the question asks to give a value to [9]x[6] ...


What is the original source of this question? And please post all the answer choices--thanks!

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Jamie Nelson
ManhattanGMAT Instructor
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