If a bell rings every 2 hours, a second bell rings every 3 hours, and a third bell rings every 4 hours. if all 3 bells ring at 9:00 am. , at what time will all 3 bells next ring?
At 9 pm. All the bells ring together every 12 hours, because 12 is the minimum common multiple of two, three, and four. So if the bells ring at 9 am, they will ring again at 9 pm.
They will all ring every 12 hours, which is the first number divisible by 2, 3, and 4. If the bells all ring at 9 AM, then the next time they will ring is 9 PM.
You need help with more than a riddle if you can't figure that one out, my friend. I hope you're in elementary school... otherwise there's just no excuse.
Reply by
jamielove (22):
gosh no need in being rude to the kid!... not everyone is so sure of themselves like some of us..... just saying..... add a comment
