Question

what will happen if you try to place two bar magnets of exactly equal size one above the other such that their north pole are on the same side. Explain your observation

Answer 1

they repel each other...
as we know that like poles repel.. and unlike poles attract...

Answer 2

The principle of magnets is that opposite poles ATTRACT and same poles REPEL.
Since you are placing the magnets on top of each other. The upper magnet will float.