LCM, HCF

Quantitative Aptitude (CDS)

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Four bells toll at intervals of 14, 21 and 42 minutes respectively. If they toll together at 11:22 am, when will they toll together for the first time after that?

11:56 am

12:04 pm

12:06 pm

11:48 am

Explanation:

LCM of 14, 21 and 42 is 42.
It means that after every 42 minutes all bells will toll together.
Then after 11:22 am they will toll at 11:22 + 42min = 11:64 = 12:04 pm

By: Amit Kumar

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