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?

• A. 1:03 PM
• B. 1:24 PM
• C. 1:30 PM
• D. 1:12 PM

Answer 1

Answer:

A. 1:03 PM

LCM (30, 45, 60) = 180 After 180 Seconds (ie; 3 Minutes) they will ring together again