Question

Three bells ring at intervals of 4,7 and 14 minutes. All three rang at 6 a.m. When will they ring together again? With explanation.

1. 6:07am
2. 6:14am
3. 6:28am
4. 6:25am​

Answer 1

Answer:

Given that, 3 bells ring at an interval of 4, 7 and 14 minutes.

Let us find the LCM of 4, 7, and 14.

4 = 2×2

7 = 7×1

14 = 2×7

LCM(4, 7, 14) = 2 × 2 × 7 = 28

Therefore, all the three balls will the ring together again at 6:28 am.