A clock strikes 6 times in 5 seconds. Assuming the strikes are evenly spaced and have zero duration themselves, how many seconds will it take for the same clock to strike 12 times?
11 seconds
6 strikes involve 5 intervals between the strikes. Since 5 strikes take 5 seconds, each interval is 1 second. 12 strikes involve 11 intervals, which equals 11 seconds.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Easy. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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