排列这些数字1,2,3,4,5,6,7,8,9成为两个数,这两个数之比为1:5。每个数字必须要用,且只能用一次。
比如说:用数字为1,2,3排成1:4的比例就是:
3:12
最好能给出思路
2697*5=13485 |
right! This is one of the answers. There are many more. How did you figure out this result? |
确实很多,我又找了几个 2769*5=13845 2937*5=14685 2967*5=14835 2973*5=14865 我是先排除一些情况,用EXCEL找的,不算作弊吧? |
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