Five bells begins to toll together and toll respectively at intervals – InterviewSolution

InterviewSolution

1.	Five bells begins to toll together and toll respectively at intervals 6,7,8,9 and 12 seconds. How many times will they toll together in one hour, excluding the one at the start?
Answer» LCM of 6,7,8,9 and 12=504 So, 504 is the smallest number which is divided by 6,7,8,9,12 completely. Hence, all the bells will ring together after each 504 seconds. So, in 1hr (`60xx60` seconds) they will ring together` =(3600)/(504)=7.14` i.e. 7 times.

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