Question

There are Four bells, Which toll at intervals of 3,7,12, 14 sec respectively. The four bells
begin to toll at 12 ‘0 clock. When will they next toll together and how often will they do
so in 14 minutes?

Answer 1

Answer:

LCM of 3,7,12,14=>

3=3

7=7

12=3*2*2

14=7*2

LCM=3*7*2*2=84seconds= 1 min 14 sec

Therefore they will ring together at exactly 12hrs:01min:14sec

Also 14 min=14*60=840sec

840/84=10

Therefore it will ring 10 times in 14 mins