1.

Five bells begin to ring together at intervals of 8 sec, 6, sec, 4 sec, 12 sec and 10 sec respectively. How many times will they ring together in the duration of one hour (excluding the ring at the st

Answer»

30



LCM of 8, 6, 4, 12 and 10 is 120.
They ring together after every 120 seconds.
Therefore, for 1 HOUR they ring 3600/12 = 30 TIMES together.



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