A person is facing South. He turns 135 degrees clockwise, then 90 degrees anti-clockwise. Which direction is he facing now?
Correct: D
Let's use degrees for directions, with North at 0 degrees (or 360 degrees), East at 90 degrees, South at 180 degrees, and West at 270 degrees.
1. Starts facing South: Initial direction = 180 degrees.
2. Turns 135 degrees clockwise: 180 + 135 = 315 degrees.
(315 degrees corresponds to North-West).
3. Turns 90 degrees anti-clockwise: 315 - 90 = 225 degrees.
(225 degrees corresponds to South-West, which is exactly between South (180) and West (270)).
Therefore, he is now facing South-West.