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标题: 請教 JJ 150 [打印本页]

作者: telecoming    时间: 2012-2-8 06:31     标题: 請教 JJ 150

2tu是个三位数,9 is a factor of 2+t+u

1
9 is a factor of u

2
3 is a factor of 2tu

有可能算的出來嗎?







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