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GMAT Prep 1_ PS Number Properties #11

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GMAT Prep 1_ PS Number Properties #11

by kwah » Fri Mar 09, 2012 9:36 am
What is the most efficient way to achieve the answer in the attached question?

I broke it down by factors...

= 990
= 99 x 10
= 33 x 3 x 2 x 5
= 11 x 3 x 3 x 2 x 5

Therefore, least possible value of n = 11

Answer: B

Please advise whether this is correct, thanks.
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by LalaB » Fri Mar 09, 2012 10:06 am
q.stem says that-
n!/990 =n!/11*10*9

u need n >= 11

since we are asked about the least n, then the answer is 11
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