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标题: one morn maths1 [打印本页]

作者: suse    时间: 2002-10-26 13:07     标题: one morn maths1

.(10)=2*4*6*8*10,What is the greatest prime factor of (20)+(22)?
答案:23

PS, i will take the test next month, need i just to see the JJ of this month?
作者: 猫猫头    时间: 2002-10-26 13:08

(20)+(22)=(20!)*(1+22)
is it clear now?
作者: tongxun    时间: 2002-10-26 13:11

need i just to see the JJ of this month?
应该够了。
作者: Kilroy    时间: 2002-10-26 15:36

不是说过这道题目答案是错的吗?
(20)+(22)=(20!)*(1+21*22)
作者: tongxun    时间: 2002-10-26 15:38

kilroy: 小心啊。现在的条件又变了




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