Clumsy Planets
- Phlembac Adib Hasan
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On each planet of a star system, there is an astronomer observing the nearest planet. The number of planets is odd and pairwisely distances between them are different. Prove that at least one planet is not under observation.
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- zadid xcalibured
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Re: Clumsy Planets
Hint:
- Phlembac Adib Hasan
- Posts:1016
- Joined:Tue Nov 22, 2011 7:49 pm
- Location:127.0.0.1
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Re: Clumsy Planets
I myself did it using contradiction.
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