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Four bells toll after an interval of 16,45,60,75 seconds respectively.these bells begin to toll together at 9a.m. at what time will they next toll together



You need to take LCM of the four numbers ,

LCM will be 3600 , it means that after 3600s they will repeat , Converting to minutes = 3600/60 = 60 min. = 1 hour

So every hour bells toll together , so after 9:00am they will toll together at 10:00am
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