Question

three bells ring at intervals of 4,7 and 14 minute .All three ring at 6 a.m. .when will they ring together?

Answer 1

First we take lcm of 4, 7 and 14. The lcm of 4 is 2x2. Lcm of 7 is 7 itself. Lcm of 14 is 2x7. Now we will find the product 2x2x7x2x7 = 392. So, after 392 minutes they ring together.

I think that it is correct answer