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The population of a bacteria culture doubles every 2

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Senior Manager
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Joined: 04 Jun 2007
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The population of a bacteria culture doubles every 2 [#permalink] New post 15 Jul 2007, 16:43
The population of a bacteria culture doubles every 2 minutes. Approx. how many minutes will it take the population to grow from 1000 to 500,000?

The OG's solution is to draw out a table showing
2 mins- 2000
4 mins- 4000
6 mins- 8000
and so on.

I just did 2*2*2*2..... till I reached an approximation of 500, which was 2^18= 512 but it took me around a minute to do it, and such a problem shouldn't take that long. Any suggestions?
Manager
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 [#permalink] New post 15 Jul 2007, 18:52
well it is easy to go for 1/2/4/8/16/32/64/128/256/512

in less than 30 secs you have your answer.....
  [#permalink] 15 Jul 2007, 18:52
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The population of a bacteria culture doubles every 2

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