4 bells ring at intervals of 6, 8, 9, and 10 seconds. All the bells ring at the same time. After how many minutes will they ring together again?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 6 min.
4 bells ring at intervals of 6, 8, 9, and 10 seconds.
L.C.M(6, 8, 9, and 10) = 360
So, the bells will ring together every 360 seconds or 6 minutes