Førjulsnøtt

The Big QuestionØkonomiprofessor Steven E. Landsburg ved University of Rochester skriver en god og underholdende blog. For en stund siden presenterte han følgende julenøtt:

The five Dukes of Earl are scheduled to arrive at the royal palace on each of the first five days of May. Duke One is scheduled to arrive on the first day of May, Duke Two on the second, etc. Each Duke, upon arrival, can either kill the king or support the king. If he kills the king, he takes the king’s place, becomes the new king, and awaits the next Duke’s arrival. If he supports the king, all subsequent Dukes cancel their visits. A Duke’s first priority is to remain alive, and his second priority is to become king. Who is king on May 6?

Så, er det noen som vil prøve seg? Løsningen er ikke så åpenbar som den først kan synes.

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