In a remote island, all the inhabitants are either knights, who always speak truthfully or liars, who always speak falsely.

Ten natives of the island are engaged in a conversation. A visitor from a nearby island approaches the natives and, asks them: "How many of you are knights?"

Each of the ten natives answer in turn: 3, 2, 5, 7, 3, 0, 4, 4, 3, 5

In reality, how many of the ten natives are knights?

(In reply to re: Solution - simpler by Ady TZIDON)

I think if there were distinct n and m, where n is repeated n times and m is repeated m times, then the puzzle as it stands would be unsolvable, wouldn't it?

Posted by Caleb on 2012-09-01 19:56:13