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Easy math question?

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dgadino
 Post subject: Easy math question?
 Post Posted: Mon Nov 17, 2008 5:18 pm 
Hi everyone,

I just registered to take the GMAT, and there is one question that's been bugging me from the practice questions they gave me with my registration. Can anyone help?

Here's the question:

[2^(4-1)^2] / 2^(3-2)

I thought this would be a very easy question, but the answer they gave was different from what I expected.

Thanks!
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RR
 Post subject:
 Post Posted: Tue Nov 18, 2008 2:14 pm 
dgadino, the numerator is not very clear in the question.

If the question is
[{2^(4-1)}^2] / 2^(3-2)
the answer is
[{2^3}^2]/2^1
=[8 ^ 2] / 2
= 64/2 = 32

If the question is
[2^{(4-1)^2}] / 2^(3-2)
the answer is
[2^{3^2}]/2^1
=[2^9]/2
= 2 ^ 8 = 256
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RonPurewal
 Post subject: Re: Easy math question?
 Post Posted: Sat Nov 29, 2008 8:09 am 
Offline
ManhattanGMAT Staff


Posts: 7146
dgadino wrote:
Hi everyone,

I just registered to take the GMAT, and there is one question that's been bugging me from the practice questions they gave me with my registration. Can anyone help?

Here's the question:

[2^(4-1)^2] / 2^(3-2)

I thought this would be a very easy question, but the answer they gave was different from what I expected.

Thanks!


please read, and comply with, the forum rules:
* title the thread according to the first few words / characters of the problem statement
* INCLUDE ANSWER CHOICES

you're required to include answer choices anyway, but especially if you're going to mention "the answer they gave" (!)

thanks in advance.
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