The Mother of all Puzzles
From a reader submitted puzzler on Car Talk (Aug. 23, 2008) which I first read about in William Poundstone's book "Are You Smart Enough to Work at Google". Hilarious reactions by readers on Peter Norvig's post on G+!
So, either you can laugh about it, or start solving this mother of all puzzles!!
Update:
On second thought this should be called "The deranged offspring of all puzzles" instead of the title above.
So, either you can laugh about it, or start solving this mother of all puzzles!!
A hundred prisoners are each locked in a room with three pirates, one of whom will walk the plank in the morning. Each prisoner has 10 bottles of wine, one of which has been poisoned; and each pirate has 12 coins, one of which is counterfeit and weighs either more or less than a genuine coin. In the room is a single switch, which the prisoner may either leave as it is, or flip. Before being led into the rooms, the prisoners are all made to wear either a red hat or a blue hat; they can see all the other prisoners' hats, but not their own. Meanwhile, a six-digit prime number of monkeys multiply until their digits reverse, then all have to get across a river using a canoe that can hold at most two monkeys at a time. But half the monkeys always lie and the other half always tell the truth. Given that the Nth prisoner knows that one of the monkeys doesn't know that a pirate doesn't know the product of two numbers between 1 and 100 without knowing that the N+1th prisoner has flipped the switch in his room or not after having determined which bottle of wine was poisoned and what colour his hat is, what is the solution to this puzzle?
Update:
On second thought this should be called "The deranged offspring of all puzzles" instead of the title above.
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