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Multiplication

One bell ring...

Question

One bell rings every 4 seconds and the other one rings every 6 seconds. Starting from 0 seconds, they will ring together after seconds.

A

8

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B

12

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C

16

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Solution

The correct option is B 12
The bells will ring at the least common multiple of 4 and 6.
Multiples of 4 = 4, 8, 12, 16.....
Multiples of 6 = 16, 12, 18, 24.....
We can observe that 12 is the least common multiple of 4 and 6.
So, starting from 0 seconds the bells will ring after 12 seconds.

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