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Tuesday 16 September 2014

Quiz 100

There is a clock that has a special way of telling the time. It does not have any hands or numbers on it, but it has a chimer.

If the time is 1 o'clock, it chimes once. If the time is 2 o'clock, it chimes twice, and so forth. The time gap between any two chimes is 4 seconds.

How many seconds would it take you to know the time, after the first chime is heard, if it is 7 o'clock?


Answer:

        If it is 7 o'clock, the clock will chime 6 times after the first chime is heard.
Since the time gap between any two chimes is 4 seconds, this will take 6 × 4 = 24 seconds.

Now, to know what time it really is, you have to wait an 'extra chime gap' to see if the clock chimes again.
Adding the extra 4 seconds, the total time required is 24 + 4 = 28 seconds

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