Question

given a pastry. someone eat it from one side how you divide it into 2 equal parts.

Answer 1

You have a square cake, and four friends. How do you divide the cake into five slices of equal size? Each slice must be slice-like, 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.