Question

There is an element which triplicates in every hour. Each of these 3 items in turn
reproduce exactly 3 other items. If a single compound is kept in a container at noon and
the container is full by midnight. At what time is the container 1/3 full.
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Answer 1

Answer:

1st hour 3, 2nd hour 3^2, so on total 12 hrs. So in 12 hrs 3^12. 1/3rd of this is clearly 3^11. So ans is 11 hrs