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Reversible hours (Posted on 2015-12-07) Difficulty: 3 of 5
Even upside down, a bat can continue to use its digital watch, because some hours are the same even when viewed in reverse. For example, this is what happens with 12:21.
Let's call these hours reversible.

What is the shortest interval between two reversible hours?

Source:Rudolpho Korchan.

No Solution Yet Submitted by Ady TZIDON    
Rating: 3.0000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Hints/Tips re: Colon included | Comment 2 of 4 |
(In reply to Colon included by Jer)

No, Sir.

None of those is the shortest interval.

  Posted by Ady TZIDON on 2015-12-08 13:37:55
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