选择题
2017 AMC 8 Problem 19: Factorials and Powers of Five
For any positive integer M, M! denotes the product of the integers 1 through M. What is the largest integer n for which 5^n is a factor of 98! + 99! + 100!?
2017 AMC 8 第19题 :五的因式和幂
对于任何正整数M , M!表示整数1到M的乘积。最大的整数n是多少,其中5 ^ n是98的因子! 99 ! 100 ! ?
A.
23
B.
24
C.
25
D.
26
E.
27