Source: Quant company interview puzzle
Problem:
Problem:
A Petri dish hosts a healthy colony of bacteria.
Once a minute every bacterium divides into two. The colony was founded
by a single cell at noon. At exactly 12:43 (43 minutes later) the Petri
dish was half full. At what time will the dish be full?
Once a minute every bacterium divides into two. The colony was founded
by a single cell at noon. At exactly 12:43 (43 minutes later) the Petri
dish was half full. At what time will the dish be full?
Hint: You can get the solution in Half a second \m/ if you won't think arbit.
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