In the following question, select that combination of the parts A, B, C, D, and E which can fit into each other to form a complete square.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (B), (C) and (D) only
Note: The given answer is as per the official NTA Answer Key. However, the parts as printed in the paper cannot form a perfect square, as explained below. Piece (C) came out of NTA’s drawing with too thin a point; the idea behind the answer still stands.
The answer given by NTA fits the parts like this: (B) along the left side, (D) along the bottom with its left slanting side against the lower slanting edge of (B), and (C) in the top-right corner, turned a quarter turn clockwise, with its point in the step between (B) and (D). This makes a perfect square only if the point of (C) is drawn as a square tooth:
With (C) as printed in the paper, its point is too narrow and too short to fill the right-angled step between (B) and (D), so gaps are left on both sides of it:
