280 secs. It also assumes a clock without markings between the hours and the minutes and the minutes and the seconds. Regards Otto On Tuesday 23 September 2003 02:05 pm, John Conway wrote:
On Tue, 23 Sep 2003, Nick Baxter wrote:
For a related problem, last year's US Puzzle Championship included the following problems from Nob Yoshigahara: What are the shortest and longest time spans from one palindromic time to the next? This assumes a 24-hour clock without leading zeros.
I think my question is neater, because to justify your answer you have to enumerate all the possible intervals.
I should have said that it assumes a 12 hour clock. JHC
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