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odd/even question

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Manager
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odd/even question [#permalink] New post 04 May 2008, 12:51
At the GMAC Practice test, the answer of this question is 27, but I don't understand why (I think it is 81).
Can anyony explain why it is 27?
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Re: odd/even question [#permalink] New post 04 May 2008, 13:51
ldpedroso wrote:
At the GMAC Practice test, the answer of this question is 27, but I don't understand why (I think it is 81).
Can anyony explain why it is 27?


Even though [9] * [6] = 81, the question is looking for [x] = 81
[27] = 3*27 = 81
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Re: odd/even question [#permalink] New post 04 May 2008, 14:14
Sorry, but I didn't understand the explanation
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Re: odd/even question [#permalink] New post 04 May 2008, 14:21
ldpedroso wrote:
Sorry, but I didn't understand the explanation


Look at the answer choices carefully. They are in form of [X] not X.
You got the 81 part correct because [9]*[6] = 81

But the answer choices is NOT 81 because [81] != 81

[27] = 3*27 = 81

:wink:
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Re: odd/even question [#permalink] New post 04 May 2008, 14:53
Ah! Ok! THANKS
How dumb I am....
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Re: odd/even question [#permalink] New post 04 May 2008, 16:22
ldpedroso wrote:
Ah! Ok! THANKS
How dumb I am....


I am sure a lot of people would fall for the trap under pressure. Just be careful...
Re: odd/even question   [#permalink] 04 May 2008, 16:22
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