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Hours of Operation (Posted on 2014-11-12) Difficulty: 2 of 5
While on a walk the other day I passed an auto body shop whose hours were 9:15am - 4:30pm. Aside from the oddly specific opening hour, I noticed that, between the two times, no digits were repeated.

(a) If I assume that I'm using a 12-hour clock, and that I'm never open at midnight, what are the longest and shortest hours of operation I can have that still have no repeated digits in my two times?

(b) What if I'm using a 24-hour clock?

[NOTE: assume no leading zeros for the hour, but leading zeros in the minute in order to always have a two-digit minutes value.]

No Solution Yet Submitted by Paul    
Rating: 3.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Some ThoughtsLongest for 12-hour clock: computer solutionCharlie2014-11-13 08:15:01
Some Thoughtsre: Longest duration, 24 hour clock (spoiler)Charlie2014-11-13 08:07:14
Some Thoughtsre: Longer duration, 24 hour clockDej Mar2014-11-13 00:00:12
Some ThoughtsEven longer?Harry2014-11-12 20:00:56
Longer duration, 24 hour clockSteve Herman2014-11-12 19:30:18
Longest duration, 24 hour clock (spoiler)Steve Herman2014-11-12 15:25:53
Longest Duration, 12 hr clock (spoiler)Steve Herman2014-11-12 15:20:35
Shortest Duration (spoiler)Steve Herman2014-11-12 09:48:32
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