Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ? : Crackverbal Support

Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ? Print

Modified on: Tue, 12 Oct, 2021 at 12:31 PM

Concept: The question tests on the basics of LCM.

Solution:

The bells toll together for the first time at at a time

=LCM(2,4,6,8,10,12)

= 120 sec = 2min

30 min has 15 such 2 min and hence the bells must have tolled together for 15 min and add 1 to it to represent their tolling together for the first time at t=0 sec.

Hence 16 times(Option D)

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Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ? Print

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