Solution
The puzzle can be played with any number of disks, although many toy versions have around seven to nine of them. The number of moves required to solve a Tower of Hanoi puzzle is 2n -1, where n is the number of disks.
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“Give a scientist a problem and he will probably provide a solution; historians and sociologists, by contrast, can offer only opinions. Ask a dozen chemists the composition of an organic compound such as methane, and within a short time all twelve will have come up with the same solution of CH4. Ask, however, a dozen economists or sociologists to provide policies to reduce unemployment or the level of crime and twelve widely differing opinions are likely to be offered.”
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