After a 180-degree rotation of the 3x3 grid 1–9, what is the bottom-right value?

• A. 9
• B. 1
• C. 3
• D. 7

Answer: (B)

Rotating a 3x3 grid by 180 degrees moves each value to the opposite corner, so the position at the bottom-right after rotation comes from the original top-left. Using the standard arrangement 1 2 3 / 4 5 6 / 7 8 9, the top-left is 1, and after rotation the grid becomes 9 8 7 / 6 5 4 / 3 2 1. Therefore, the bottom-right value is 1.