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PP-T1-DS3

由 max999 » 2008-02-21 18:34

How many different prime numbers are factors of the positive integer n ?

(1) Four different prime numbers are factors of 2n.
(2) Four different prime numbers are factors of n2 (n平方).

answer: B

max999: 中級會員; 文章: 82; 註冊時間: 2008-02-06 11:36

由 amazingslim » 2008-02-21 23:26

請參考
http://www.formosamba.com/phpBB3/viewtopi ... me+numbers
可多加利用搜尋

amazingslim: 中級會員; 文章: 147; 註冊時間: 2007-08-11 17:14

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