Question:
There are three bells which ring at regular intervals of 30, 45 and 60 seconds respectively. If all of them ring together at 1:00 PM, at what time will they ring together again?
A1:03 PM
B1:24 PM
C1:30 PM
D1:12 PM
Answer:
A. 1:03 PM
Explanation:
LCM (30, 45, 60) = 180 After 180 Seconds (ie; 3 Minutes) they will ring together again