Question

* Four bells ring simultaneously and afterwards at intervals of 3, 6, 9 and 12 sec
respectively. How often will they all toll together in one hour?​

Answer 1

hundred times

since it rings once every 36 second that is the lcm of all of em i.e(3,6,9 and 12 all ring at every 36 seconds)

and aince there are 3600 seconds in an hour they will 100 times.