Question

Four bells ring at an interval of 5 minutes , 10 minutes, 15 minutes and 20 minutes. All the four bells ring at 8 O' clock in the morning. When they will ring again?
Answer fast​

Answer 1

Answer:

LCM of 5,10, 15 and 20 is 60

Hence they will ring again together after 60 minutes or 1 hour.

Thus they will ring again together at 9 O' clock

Answer 2

ANSWER : THE L.C.M OF 5,10,15,20 IS 60 MEANS ONE HR THAT MEANS ALL THE FOUR BELLS WILL RING AT 9:00.

HOPE IT HELPS YOU.