Three bells ring at intervals of `4, 7 and 14` minutes. All three rang – InterviewSolution

InterviewSolution

1.	Three bells ring at intervals of `4, 7 and 14` minutes. All three range at `6` am. When will they ring together again ?
Answer» We have to find a number (in time ) which is divided by all the 3 numbers completely. It means `to LCM ` of 3 number. `4=2xx2` `7=7` `14=2xx7` `:. LCM=2xx2xx7=28` So, 28 is the smallest number which is divided by 4,7 and 14 completely. Hence, all the three bells will ring together at 6:28 am.

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