Q. The traffic lights at three different road crossings change after 24 seconds, 36 seconds, and 54 seconds respectively. If they all change simultaneously at 10:15:00 AM, then at what time will they again change simultaneously ?

• A. 10:16:54 AM
• B. 10:18:36 Am
• C. 10:17:02 AM
• D. 10:22:12 AM

Correct Answer: B