Magic and Illusion/can you tell me the solution because i saw it but i forgot the solution
it is a magic trick with 9 coins, and the magician asks you to use as many matchsticks as you want but create only two compartments separating all of them..... i know that the first compartment was around the center coin and the other one is a box that goes diagonally around all of them. i don't know how exactly it is placed
If you draw this as a 3x3 matrix, it should become clear - BUT I would build the NON centre compartment first - this is a diamond shape which leaves the four corners outside it. The next one is a square which as you say is around the centre coin, but each corner of this should touch the middle of a line of the diagonal one - thus no one coin is in the same area as another one.