Tahir is facing west. He then turns 90° clockwise, and then 135° anticlockwise. After that, he turns 45° anticlockwise. Now, which direction is he facing?

1. A

   North-West

2. B

   South

3. C

   South-East

4. D

   West

Appeared in: NVS Staff Nurse - 2022

Explanation

• The solution involves tracking sequential rotations from a starting direction.
• Starting from West, a 90° clockwise turn leads to North.
• From North, a 135° anticlockwise turn (90° + 45°) leads to South-West.
• Finally, a 45° anticlockwise turn from South-West leads to the final direction, South.
• Alternatively, the net rotation is calculated as +90° - 135° - 45° = -90°, which is a 90° anticlockwise turn. A 90° anticlockwise turn from West is South.

Why Other Options Were Wrong

• Option A: This direction would be incorrect. It might be reached if the 135° anticlockwise turn from North was misinterpreted as only a 45° turn, leading to North-West.
• Option C: This direction is incorrect. It could result from incorrectly summing the angles or reversing a turn's direction, for instance, treating the final 45° turn as clockwise from South-West.
• Option D: This is the starting direction. This answer would imply that the net effect of all turns is 0° or 360°, which is not the case. The net rotation is -90°.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Directional Sense and Rotation as background academic context rather than a clinical decision trigger.
• This question tests logical and spatial reasoning, not a direct clinical concept.
• Strong reasoning skills are essential for nurses in prioritizing tasks, troubleshooting equipment, and making sound clinical judgments under pressure.
• This type of problem-solving helps in developing a methodical approach to complex situations, which is transferable to clinical scenarios.

How to Approach the Question

• First, identify the initial direction mentioned in the problem (West).
• Draw a simple compass diagram (North, South, East, West) to help visualize the movements.
• Process each turn one by one, updating the person's facing direction after every turn.
• Remember that clockwise is a right turn and anticlockwise is a left turn.
• Alternatively, calculate the net rotation by assigning positive values to clockwise turns and negative to anticlockwise, then apply the final net rotation to the starting direction.

Concept Tested & Keywords

• Concept Tested: Directional Sense and Rotation
• Stem keywords: facing west, turns 90° clockwise, 135° anticlockwise, 45° anticlockwise
• Lead-in keywords: which direction is he facing

Question ID

QKdCXh90IoMzD3krPA-wqN

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