Question

Five bells begin to toll together at intervals of 9 second 6 second 4 second 10 second and 8 second respectively. How many times will they toll together in the span of one hour (excluding the toll at the star)

Answer 1

10 times.

Step-by-step explanation:

The five bells begin to toll together at intervals of 9 seconds 6 seconds 4 seconds 10 seconds and 8 seconds respectively.

Now, if they toll together right now, then they will together again after an interval which is the least common multiple of 9, 6, 4, 10 and 8 seconds.

So, we have to find the L.C.M of those five numbers which is 360 seconds.

Now, 3600 seconds = 1 hour.

Therefore, within an interval of 3600 seconds, the bells will toll together by $\frac{3600}{360} = 10$ times excluding the toll at the start. (Answer)  

Answer 2

Answer:

12 times and you can like me