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2020-10-08 00:20 DarkStoorM  
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So, who's lucky enough to do 30 pushes with no stops? :D :D  
  
How many attempts would that be? 1/4 to the power of 30?

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2020-10-08 00:29 dustin  
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yup, on average :D about 10 to the power of -18. less likely than winning the lottery jackpot twice in a row :D

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2020-10-08 20:28 Arno  
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intended solution is free :-) don't think there are other ways, right? ;-)

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2020-10-08 21:57 dustin  
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at least our solutions are identic, and i don't see another way either. funny mathematic detail: the butterfly's moving period must be a multiple of the firefly's spinning period :D