涛涛1-31，请大家指点

红色为涛涛版答案

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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

Answer: B  D

98的质数因子为2和7，符合条件，为什么不选？