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Solution: The first bell will ring after every 6,12,18,24,…minutes. Similarly the second one after 8,16,24,32,…minutes
And the third one after every 12,24,… minutes.
So all the three bells will ring simultaneously after every 24 minutes which is the LCM.
So they will for the third time together after 24 x 3 = 72 minutes i.e. 1hour 12 minutes i.e. at 1.12 p.m.