Four bells begin to toll together respectively at the intervals of 8, 10, 12 and 16 seconds. After how many seconds will they toll together again?
Q1. Four bells begin to toll together respectively at the intervals of 8, 10, 12 and 16 seconds. After how many seconds will they toll together again?
Answer: 240 seconds
Explanation: LCM(8, 10, 12, 16) = 240; the four bells will toll together again after 240 seconds.