Question

Two clocks chime once every P minutes and every O minutes respectively, if P
and Q are primes then at what intervals do the two clocks chime together?​

Answer 1

Explanation:

LCM of 15,20,30=60

so that clocks will chime together after every 60 minutes.

Therefore, after 10 am they will chime together at 11 am

Answer 2

Two clocks chime every P minutes and O minutes respectively ,

Given P and Q are primes .

For this we will have to take LCM of P and Q .

The LCM of two prime numbers = their product .

Therefore , The answer of lcm value of P and Q , that is their product ,will give us the interval at which the two clocks chime together.