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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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Beg to differ with those who beg to differ | Comment 9 of 22 |
What you are missing is that you have no clue how many times the clock chimed the first time it woke you up! you can't say that after the first hour you've heard 3 single chimes, because you can't definitively say that the first chime was single.
  Posted by JoeFish on 2005-08-09 19:26:01
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