Find the odd one?

Appeared in: NORCET 5 Prelims - Sept 2023 (Shift-2)

Explanation

The correct option is Figure D, which is a circle divided into four quadrants.
Figures A, B, and C all share the common property of being star-shaped figures with multiple sharp points projecting outwards.
Figure A is a sun-like shape, Figure B is a pentagram, and Figure C is an octagram.
Figure D is geometrically distinct because it has a smooth, continuous circular boundary and lacks any outward-pointing vertices.

Option A: Figure A is incorrect because it fits the pattern of being a star-like figure (a sun with rays), which is consistent with Figures B and C.
Option B: Figure B is incorrect because, as a five-pointed star, it shares the common characteristic of having outward-pointing vertices with Figures A and C.
Option C: Figure C is incorrect because it is an eight-pointed star, which aligns with the pattern of star-shaped figures seen in A and B.

Visual 1: Infographic: A visual guide comparing convex shapes (like circles) and non-convex or star polygons to highlight the key difference in their boundaries and vertices.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Visual Reasoning: Odd One Out as background academic context rather than a clinical decision trigger.
While not a clinical question, this type of logical reasoning problem assesses analytical and pattern-recognition skills.
These cognitive skills are crucial for nurses in clinical practice for tasks such as interpreting complex data, identifying subtle changes in a patient's condition, and making sound clinical judgments.
What if? If Figure D were replaced with a triangle, the odd one out might be Figure A, as it has a central circular element unlike the other pure polygons (star, star, triangle).

How to Approach the Question

First, carefully examine all four figures to understand their individual geometric properties.
Next, try to identify a common feature or pattern that is shared by three of the figures. Consider aspects like shape, number of points, lines, or overall structure.
In this set, observe that Figures A, B, and C are all variations of a star shape, characterized by points radiating outwards.
Then, identify the figure that does not conform to this established pattern. Figure D, a circle, lacks these radiating points.
Conclude that the figure which breaks the pattern is the 'odd one out'.

Concept Tested & Keywords

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Practise the full NORCET 5 Prelims - Sept 2023 (Shift-2)

Attempt every question from this paper in a timed mock, then review the full solution for each one.