Four bells were set at intervals of618.min, 15 min, 24 min and 30 minc

1.	Four bells were set at intervals of618.min, 15 min, 24 min and 30 minconsecutively, If all of them rangat 4 p.m, at what time will thering together again?A. 4 a.mB. 5 a.mC. 5.15 p.mD. 6 p.m
Answer» Four bells set at intervals of 6 min, 15 min, 24 min and 30 min All ball rang at 4 pmNow, Find lcm of 6, 15, 24, 30 LCM of 6, 15, 24, 30 = 120 That means all bell ring together after 120 min or 2 hrs. So all bells ring together at 6 pm

Four bells were set at intervals of618.min, 15 min, 24 min and 30 minconsecutively, If all of them rangat 4 p.m, at what time will thering together again?A. 4 a.mB. 5 a.mC. 5.15 p.mD. 6 p.m

Answer»

Four bells set at intervals of 6 min, 15 min, 24 min and 30 min

All ball rang at 4 pmNow, Find lcm of 6, 15, 24, 30

LCM of 6, 15, 24, 30 = 120

That means all bell ring together after 120 min or 2 hrs.

So all bells ring together at 6 pm