The Grandfather Clock Mystery.
7 Feb
Right, time for a toughy.
There is a grandfather clock that chimes the appropriate number of times to indicate the hour and then chimes once each quarter hour. If you were in a different room and heard the clock chime once, what would be the longest period of time you would have to wait in order to be certain of the correct time?
Put your answers in the comments and check the answers page tomorrow to see if you’re right. Good Luck!

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