Six bells ring at intervals of 2,4,6,8,10 and 12 s, respectively. They started ringing simultaneously. How many times, will they ring together in 30 min?

Seven bell sring at intervals of 2,3,4,6,8,9 and 12 min,respectively.They started ringing simultaneously at 5:00 in the morning. What will be the next time when they all ring simultaneously?

Four bells ring at intervals of 4, 6, 8 and 14 seconds. They start ringing simultaneously at 12.00 O' clock. At what time will they again ring simultaneously?

Three bells toll at intervals of 8, 12 and 15 minutes respectively. If they start tolling together, after what time will they toll together again

Three bells ring at intervals of 15, 20 and 30 minutes respectively. If they all ring at 11.00 a.m. together, at what time will they next ring together ? A. 11.30 a.m. B. 12 noon C. 12.30 p.m. D. 1.00 p.m.