作者pugarine (好吧)
看板GRE_Verbal
标题[计量] BigBook
时间Sun Oct 21 21:25:31 2007
P401 的第29题
A positive integer with exactly two different divisors
greater than 1 must be
(A) a prime
(B) an even integer
(C) a multiple of 3
(D) the square of a prime
(E) the square of an odd integer
答案是(D)
可是我不懂,这样为什麽会有两个不同的divisor
平方不就是两个一样的下去乘吗?
谢谢
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 122.125.69.4
1F:推 mountain31:ex:49 divisor有1,7,49 大於1有2个 125.225.82.158 10/21 21:44
2F:推 prodigywu:还有一个因数是自己 61.230.75.165 10/21 21:45
3F:推 mhcai:exactly two different divisors greater 59.112.183.162 10/21 21:57
4F:→ mhcai:than 1 .............."exact"!! 59.112.183.162 10/21 21:58
5F:→ mhcai:我一开始也没看懂呢 59.112.183.162 10/21 21:59