Chameleons
A puzzle in honor of Hadaso -- Happy Birthday!
At one point, a remote island's population of chameleons was divided as follows:
* 13 red chameleons
* 15 green chameleons
* 17 blue chameleons
Each time two different colored chameleons would meet, they would change their color to the third one. (i.e.. If green meets red, they both change their color to blue.) Is it ever possible for all chameleons to become the same color? Why or why not?"
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