Four bells start ringing simultaneously and continue to ring at intervals of 8, 10, 12, and 16 seconds respectively. After how many seconds will all four bells ring together again?

Explanation

To find when all four bells will toll together again, calculate the Least Common Multiple (LCM) of their intervals: 8, 10, 12, and 16 seconds. The LCM of these numbers is 240 seconds, so the bells will ring simultaneously again after 240 seconds.