In detail

The hanging donut

The hanging donut

Imagine you have a donut attached to a rope and hung from the ceiling,

How could you cut the rope without the donut falling out, taking into account that it is held in the air and cannot be caught in any way?

Solution

We make a strong knot in the middle of the rope, then we cut the turn of the knot, so the rope will be cut but will still hold the donut.