Question

three bells ring at intervals of 10 15 and 20 minutes respectively the three bells ring together at 12 o'clock at what time will they ring together next​

Answer 1

Answer:

at 1 o'Clock

the time of the first bell ring

10,20,30,30,40,50,60....

the time of the second bells ring

15,30,45,60,75,90..

the time of third bell ring

20,40,60,80,100,

as you can see the all three bell ring at the time interval of 60 minutes

so if the all bell rings at 12 o'Clock next will be at 1 o'clock

Answer 2

At 5 o’clock the will ring together