Question

Five diagrams \(A, B, C, D,\) and \(E\) are given. Three out of these, when put together, form a square. Identify the correct set of diagrams.

• A. \(A, C, D\)
• B. \(B, C, D\)
• C. \(A, B, C\)
• D. \(C, D, E\)

Hint:

In such puzzles, always focus on the outer boundary first—if it cannot become a perfect square, the combination is incorrect.

Answer 1

The Correct Option is B

Concept:
In figure-assembly problems, the combined shapes must form a perfect square with:
No gaps,
No overlaps,
Straight outer boundaries.
Each selected piece must complement the others so that all protrusions and indentations cancel out. Explanation:
Diagram \(D\) provides the vertical extension needed for the square.
Diagrams \(B\) and \(C\) together balance the horizontal protrusions and fill the remaining gaps.
When combined, \(B, C,\) and \(D\) fit together to form a complete square with straight edges on all sides.
The other combinations either leave gaps or produce an irregular boundary. Hence, the three diagrams that form a square are: \[ \boxed{B,\ C,\ D} \]