After a 270-degree clockwise rotation (or 90-degree counterclockwise) of the 3x3 grid, what is the top-right value?

After a 270-degree clockwise rotation (or 90-degree counterclockwise) of the 3x3 grid, what is the top-right value?

• A. 3
• B. 9
• C. 1
• D. 7

Answer: (B)

Rotating a grid moves each value to a new position in a systematic way, so the top-right corner after rotation comes from a specific original cell. A 270-degree clockwise rotation is the same as a 90-degree counterclockwise rotation. If the original 3x3 grid is 1 2 3 4 5 6 7 8 9 a 90-degree counterclockwise rotation yields 3 6 9 2 5 8 1 4 7 In this result, the top-right position holds the value 9. So the top-right value after the rotation is 9.

Rotating a grid moves each value to a new position in a systematic way, so the top-right corner after rotation comes from a specific original cell. A 270-degree clockwise rotation is the same as a 90-degree counterclockwise rotation. If the original 3x3 grid is

1 2 3

4 5 6

7 8 9

a 90-degree counterclockwise rotation yields

3 6 9

2 5 8

1 4 7

In this result, the top-right position holds the value 9. So the top-right value after the rotation is 9.