请教gwd1－Q31:

gwd1－Q31:

A positive integer n is said to be “prime-saturated” if the product of all the different positive prime factors of n is less than the square root of n.  What is the greatest two-digit prime-saturated integer?

A.      99

B.      98

C.      97

D.     96

E.      95

将选项带进去检验就好了

A 3×11大于99的平方根
B 2×7
C 97
D 2×3＝6小于96的平方跟
E 5×19

所以D

嗯～谢谢～

我一开始看不懂题意～