1 Is a 3-digit number N less than 550?
(1) product of digits in N is 30
(2) sum of digits in N is 10
我觉得选A, 因为30=2*3*5,可以直接得出组成的3个数字了阿
但是答案是C
不解,哪位NN解释下,谢谢
晕,没人理我[em53]
有人作到了这道题没?怎么会选C阿?
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