A clock strikes 6 times in 5 seconds. Assuming each strike takes zero duration and only the intervals between strikes take time, how many seconds does it take for the same clock to strike 12 times?
11 seconds
6 strikes mean there are 5 intervals between them. If 5 intervals take 5 seconds, each interval is 1 second long. For 12 strikes, there are 11 intervals. Therefore, 11 intervals take 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: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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