不懂的两道题

tanmagic

谁能指导小弟一下两题？不胜感激

If p is the product of the integers from 1 to 30, inclusive, what is the greatest integer k for which 3^k is a factor of p?

A. 10

B. 12

C. 14

D. 16

E. 18

If p is the product of the integers from 1 to 30, inclusive, what is the greatest integer k for which 3^k is a factor of p?

A. 10

B. 12

C. 14

D. 16

E. 18

sammen

1)其实就是找出含3这因子的数,3=3*1,6=2*3,9=3*3...以次类推,最后数一下有几个3.

楼主贴的题目是不是贴重复啦?