Question

Five bells begin to toll together and toll respectively at intervals of 6, 5, 7, 10 and 12 seconds. How many times will they toll together in one hour excluding the one at the start?.

Answer 1

Answer:

taking the lcm we get lcm as 420 thusbthey toll at every 420th second...3600/420 we get as 8 times. Thus they toll 8 times