在24小時制且只顯示時跟分的電子鐘上,
出現連續排列3個以上相同的數字有多少次呢?
(如:1:11, 2:22, 3:33,...)
反白看解答:
解析:
43次。
(00:00 00:01 00:02 00:03 00:04 00:05 00:06 00:07 00:08 00:09
01:11 02:22 03:33 04:44 05:55 10:00 11:10 11:11 11:12 11:13
11:14 11:15 11:16 11:17 11:18 11:19 12:22 13:33 14:44 15:55
20:00 21:11 22:20 22:21 22:22 22:23 22:24 22:25 22:26 22:27
22:28 22:29 23:33)
(00:00 00:01 00:02 00:03 00:04 00:05 00:06 00:07 00:08 00:09
01:11 02:22 03:33 04:44 05:55 10:00 11:10 11:11 11:12 11:13
11:14 11:15 11:16 11:17 11:18 11:19 12:22 13:33 14:44 15:55
20:00 21:11 22:20 22:21 22:22 22:23 22:24 22:25 22:26 22:27
22:28 22:29 23:33)