One math question from GMATPrep

boston8899 · 发表于 2008-1-7 22:19:00

n! is a multiple of 990, what is the least possible value of n?

10

11

12

13

14

Is there anyone who could help with it? Many thanks.

54yyer · 发表于 2008-1-7 22:27:00

分解质因数出：2 3 3 5 11

所以至少要有11才行，n最少11

[此贴子已经被作者于2008-1-7 22:26:58编辑过]

boston8899 · 发表于 2008-1-8 06:22:00

thanks! I didn't quite understand it when I did it. Gotta read it a couple of more times.

boston8899 · 发表于 2008-1-8 06:26:00

I thought here, "least" == "last". anyway, thanks again.

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