Question

Two bells ring once at the same time. After that, the first bell rings after every 63 minutes and the second after every 42 minutes. After how many minutes will they again ring together?​

Answer 1

Answer:

Step-by-step explanation:126 minutes

take LCM

63,42  3

21,14      7

3,2       3

1,2       2

1,1

LCM=3*7*3*2=126

ans = 126 minutes