# Four bells toll at intervals of 2, 4, 8, 12 minutes respectively. If they start tolling together at 11 a.m. Find after what interval will they toll together and how many times they toll together in 8 hours.

Correct Answer: Description for Correct answer:

LCM of 2, 4, 8, 12 is 24 min.

\( \Large \frac{2,\ 4,\ 8,\ 12}{2} = 1,\ 2,\ 4,\ 3, \)

So they will toll together after 24 minutes.

In 8 hours, they will toll together

\( \Large \frac{480}{24}+1\ time\ at\ the\ start \) = 21 times.

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