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Tower of Hanoi

The Tower of Hanoi is a mathematical game or puzzle.

  • This tower of Hanoi consists of three rods and eight round disks of different sizes and a board
  • Each disk has a hole in the center so that it can slide to other rod
  • The disks are initially stacked in increasing size on one of three pegs
  • The objective of the puzzle is to move the entire stack to another rod
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The puzzle was invented by the French mathematician Édouard Lucas in 1883. There is a story about an Indian temple in Kashi Vishwanath which contains a large room with three time-worn posts in it, surrounded by 64 golden disks. Brahmin priests, acting out the command of an ancient prophecy, have been moving these disks in accordance with the immutable rules of Brahma since that time. The puzzle is therefore also known as the Tower of Brahma puzzle. According to the legend, when the last move of the puzzle is completed, the world will end

If the legend were true, and if the priests were able to move disks at a rate of one per second, using the smallest number of moves it would take them 264 − 1 seconds or roughly 585 billion years to finish.

There are many variations on this legend. For instance, in some tellings the temple is a monastery, and the priests are monks. The temple or monastery may be said to be in different parts of the world—including Hanoi, Vietnam—and may be associated with any religion. In some versions other elements are introduced, such as the fact that the tower was created at the beginning of the world, or that the priests or monks may make only one move per day.

Additional information

Weight 150 g
Dimensions 19 × 6 × 9 cm