# Worked Examples

Observe that each figure contains four circles and one-fourth of each circle is shaded. From Figure Aâ€“B, the shaded portion only in top circle is changing its position, whereas in other circles it remains the same. From Figure Bâ€“C, the shaded portion only in the right circle is changing its position, but in other circles it remains the same. From Figure Câ€“D, the shaded portion only in the bottom circle is changing its position and remains unchanged in other circles.

By applying the same pattern, from Figure D to the missing figure, the shaded portion only in the left circle should change the position and it should remain unchanged in other circles. So, the correct option is 4.

Answer: (4)

In each step, one line segment is changing its position from one end to another end.

Answer: (2)