Question

Five Bells commence tolling together and toll at intervals 3, 6, 9, 12 and 15 seconds respectively in 45 minutes how many times do they toll together

Answer 1

After 180 seconds, all the bells will toll together.

Therefore, in 45 minutes, the bell would toll around (45 x 60)/ 180 times.

On solving, we get 15. However, as per the question, the bell tolling starts together and hence on total they would toll around 15 + 1 = 16 times.