Cake cut puzzle
Cut the cake fairly
This puzzle was given by Alex Bellos in the Guardian in 2016 (https://www.theguardian.com/science/2016/nov/21/can-you-solve-it-do-you-cut-cake-correctly)
Cut the square cake equally into five portions. Each cut must be a 'slice-like' cut, meaning that the knife cuts vertically and the tip of each slice is at the centre of the cake. You have no ruler or tape measure, but you can use the horizontal grid here.