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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 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re(2): Colon included / no cheatingJer2015-12-09 11:34:46
Some Thoughtsre: Colon includedDej Mar2015-12-09 07:58:20
Hints/Tipsre: Colon includedAdy TZIDON2015-12-08 13:37:55
Colon includedJer2015-12-07 16:14:42
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