The monks have 3 rods and a set of circular discs of different sizes; each disc has a hole in the centre which allows it to be slid onto any of the rods.

Initially the discs were all placed on a single rod, one on top of the other in order of decreasing size, so that they formed a single tower as its initial state.

The task the monks have set themselves is to transfer this original tower to one of the other rods, moving only one disc at a time and ensuring that no disc ever rests on top of a smaller one.

The labor involved in carrying out this task is said to be spiritually uplifting, and the monks believe that its completion will herald the end of the world.

Try it! It is funny.
Train your brain and finish it in 31 moves.

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