Q Four bells ring simultaneously at 9 am. They ring at regular intervals of 10 minutes, 20 minutes, 30 minutes, 40 minutes respectively. The next time when all the four bells ring together is:

A. 11 am
B. 10:30 am
C. 1:00 pm
D. 11:30 am

Correct Answer: A

Explanation:
LCM of 10,20,30,40 = 120 minutes = 2 hours. Next together at 9am + 2 hours = 11 am.

LCM / Time Veterinary Pharmacist 2024 Report Error

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