[讨论]10月math机经238题

popularking · 发表于 2003-10-21 00:14:00

５）１４２０在１到１００中有几个质数因子．
四个
1420 = 2^2 * 3 * 5

Should be 3? Two 2, but can we say 2 质数因子?

PopularKing · 发表于 2003-10-21 00:15:00

1420 = 2^2 * 5 * 71

Should be 3? They are 2, 5 and 71 质数因子, where is the fourth one?

SinoBoy · 发表于 2003-10-21 00:28:00

同意3个。

merit · 发表于 2003-10-21 05:28:00

题目中问的是有几个质数因子,而不是有几个不同的质数因子．

以下是引用popularking在2003-10-21 0:14:00的发言：
５）１４２０在１到１００中有几个质数因子．
四个
1420 = 2^2 * 3 * 5

Should be 3? Two 2, but can we say 2 质数因子?

所属分类: GMAT考试