Question

If one magnet with same pole is kept on the other what will happen to the strength of magnet

Answer 1

first of all if you keep a magnet of same pole on another that will lead to repulsion and moreover according to your question the strength of the new magnet will be combination of both hence the magnetic strength will increase

Answer 2

Like Magnets-If the norths and souths of 2 magnets are kept facing each other,then they will repel.

Unlike magnets-If the north of one magnet is kept facing the south of the other magnet,then they will attract