Logical Reasoning
hardQ. No. 19840
A candidate initially faces West. He turns 270° left, then turns 90° right, then turns 180° left. Which direction is he facing at the end?
Last Updated:
ANorth
BWest
CEast
DSouth
Correct Answer: WestYour Answer: B
Explanation
Step 1: Write the clockwise compass order North → East → South → West. | Step 2: Begin at West. Treat every 90° right as one clockwise step and every 90° left as one anticlockwise step. | Step 3: Apply the commands separately rather than adding their angles without direction: turns 270° left, then turns 90° right, then turns 180° left. | Step 4: The direction after each command is West → North → East → West. | Step 5: A 180° command reverses facing, while a 270° turn equals a 90° turn in the opposite sense. | Step 6: The last entry in the trace is West, so this is the final orientation. | Final Answer: Option B — West.
Important Notes
- Turns are applied from the person's current facing direction, not from the page. |
- Write the clockwise cycle North → East → South → West → North. |
- A 90° right turn moves one step clockwise; a 90° left turn moves one step anticlockwise. |
- A 180° turn reverses the direction regardless of left or right. |
- Reduce 270° right to 90° left, and 270° left to 90° right. |