Ok so here is a brainteaser, you should get it in your second attempt at the max., else consider yourself poor at math An ant is in one corner of a cube shaped room. (say one of the bottom corners on the floor). The ant decides to go to the opposite corner on the roof, which would fall on the diagonal of the cube. Unfortunately, the ant cannot fly, else it would have taken the body diagonal route of the cube to reach there. But the ant is most tired, and it wants to take the shortest route possible. Help the ant out!