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How Long 'til Morning? (Posted on 2005-08-09) Difficulty: 1 of 5
I have a clock at home that chimes on every hour and half hour mark. On whole hour marks it chimes once for each hour, and on half hour marks it chimes only once.

One night I was wakened suddenly and realized the the clock had chimed, but I did not know how many times. As I lay awake thinking about nothing in particular I heard the clock chime once and started wondering what time it was.

What is the longest amount of time I would have to lie awake before I knew for sure what time it was?

See The Solution Submitted by Erik O.    
Rating: 2.5000 (8 votes)

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Little Add-on | Comment 2 of 22 |
Just for clarification, the clock could not have chimed originally at some half hour other than 12:30, because for any other half hour the first indication of time you'd hear would be more than one chime
  Posted by JoeFish on 2005-08-09 03:06:11
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