[其他] 求出一九位數
有一九位數abcdefghi 每個位數皆為1~9其中一數 且每個位數皆相異
若1|a, 2|ab (a為十位數 b為個位數), 3|abc..., 9|abcdefghi
即前k個數字組成的k位數皆可被k整除
求此九位數為?
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推
04/08 21:20, , 1F
04/08 21:20, 1F
→
04/08 21:42, , 2F
04/08 21:42, 2F
推
04/09 01:45, , 3F
04/09 01:45, 3F
→
04/09 01:46, , 4F
04/09 01:46, 4F
→
04/09 01:46, , 5F
04/09 01:46, 5F
→
04/09 01:46, , 6F
04/09 01:46, 6F
→
04/09 01:47, , 7F
04/09 01:47, 7F
推
04/09 01:59, , 8F
04/09 01:59, 8F
→
04/09 07:02, , 9F
04/09 07:02, 9F
推
04/09 13:40, , 10F
04/09 13:40, 10F
→
01/02 15:43,
5年前
, 11F
01/02 15:43, 11F
→
07/07 12:00,
4年前
, 12F
07/07 12:00, 12F
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