Question

Three bells are played by the difference between 15 seconds, 20 seconds, and 25 seconds, respectively. They keep playing for 12 minutes continuously. They will play together in which period
A.4 times
B.3 times
C.6 times
D.2 times

Answer 1

4 times . by taking the L.C.M we get the answer and by seeing how many times the l.c.m goes in total time without getting the decimal points in division.