Question

The symbols ○, ✶, △, and □ are to be filled in a grid. Rules: 1. Every row and every column must contain each of the four symbols.
2. Every 2×2 square (bold lines) must also contain each of the four symbols. Which symbol will occupy the box marked with '?'? \begin{center} \includegraphics[width=0.5\textwidth]{02.jpeg} \end{center}

• A. ○
• B. ✶
• C. △
• D. □

Hint:

In puzzles with grid-filling rules (similar to Sudoku), always check row, column, and box constraints together. The unique missing symbol is the answer.

Answer 1

The Correct Option is D

Step 1: Inspect Row 1.
Row 1 already has symbols ○ and △. Hence the missing ones in that row are ✶ and □.

Step 2: Inspect Column 1.
Column 1 already has ○ (in Row 2) and ✶ (in Row 3). Hence, the missing ones in that column are △ and □.

Step 3: Inspect Top-left 2×2 block.
Symbols inside this block: ○, ✶, △ are already present. The only missing one is □.

Step 4: Conclusion.
Therefore, the box with '?' must be filled with: \[ \boxed{□} \]