Choose the figure which is different from the other three.

The correct answer is Option (4) → 

Look at the shape of the pieces each figure is cut into. In three figures every piece is a triangle. Option (4), a hexagon divided into six parts, two of them shaded, is cut into four-sided pieces, so it is the odd one out.

Option (1) — Incorrect. A hexagon divided into six parts, two of them shaded: every piece is a triangle.

Option (2) — Incorrect. A pentagon divided into five parts, two of them shaded: every piece is a triangle.

Option (3) — Incorrect. A pentagon divided into five parts, two of them shaded: every piece is a triangle.