In each of the following questions, there are five numbered figure and two un-numbered figure on the extremes. These seven figures form a series. However one of the five numbered figures does not fit into the series. The number of that figure is the answer.

Explanation

The arrow reverses its direction in one step and moves to the other side of the central line in the next step. In figure (2), the direction of the arrow should be opposite. Hence answer is 2.