Poles : Magnet ::? : Battery

As Tiger is found in Forest similarly Otter is found in the water.

As opposite meaning of peace is chaos similarly opposite meaning of creation is destruction.

As the result of Race is Fatigue similarly the result of Fast is Hunger.

As President is the nominal head of a country, similarly Governer is the nominal head of a State.

As Cloth is made in a Mill, similarly Newspaper is printed in press.

A Priest wears cassock while Graduate wears gown.

As effect of Ice is coldness similarly the effect of Earth is gravitation.

As Physician does the treatment similarly Judge delivers the judgement.

9 + (2)² = 13

13 + (3)² = 22

22 + (4)² = 38.