ChaseDream

标题: 请教gwd1－Q31: [打印本页]

作者: xudbbingo 时间: 2006-11-23 23:34
标题: 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

作者: Abbigail_law 时间: 2006-11-24 00:12

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

作者: xudbbingo 时间: 2006-11-24 09:18

嗯～谢谢～

我一开始看不懂题意～

欢迎光临 ChaseDream (https://forum.chasedream.com/)