My friend actually had this question on a Job application...I keep going around in circles on it and its kind of irritating lol. Can anyone answer this and explain how they did?

I do wonder how this has any bering on real life, unless the family is packing explosives or something lol.

A family is moving and has a number of electronic devices
in the same packing crate. One of the devices beeps every 8 minutes,
another device beeps every 10 minutes, and a third device beeps every 12
minutes. If all the devices beeped together at 3:00 pm, what time will
it be when they all beep together next?