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07-01-2017
Mathematics

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Three lights go on together first changes every 5 sec second every 6sec third every 8 sec when is the next time they go on together

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Аноним Аноним

07-01-2017

In order to calculate, you need to find their LCM
LCM of 5,6 and 8 is equal to 120

So, That time will be 120 sec = 2 min.
In short, Your Final Answer would be 2 min.

Hope this helps!

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