Six bell commence tolling together and toll at intervals of 5, 10, 15, 20, and 30 s, respectively. In 60 min, how many times do they toll together?

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Accepted Answer

LCM of 5, 10, 15, 20, 25 and 30 is 300. So, the bell will toll together after every 300s (5min). So, the number of times they toll together = 60/5 + 1=13

Six bell commence tolling together and toll at intervals of 5, 10, 15, 20, and 30 s, respectively. In 60 min, how many times do they toll together?

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