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Question

A Swiss watch is being shown in a museum which has a very peculiar property.

It gains as much in the day as it loses during the night between 8pm to 8am

In a week how many times will the clock show the correct time?


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Solution

Let us assume the watch loses x minutes between 8pm to 8am.

So, in the day it will gain x minutes.

Hence it will show the correct time every day.

And on the last day it will show the correct time at 8pm also. Therefore, in a week, the clock shows 8times the correct time.


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