Identify the figure that is odd in the group& x20; - NORCET 9 Prelims-2025

NORCET 9 Prelims-2025

Reasoning

Medium

Appeared in: NORCET 9 Prelims-2025

Explanation

The Circle is the correct answer as it is the only figure that is not a polygon.
It is a curved shape, meaning it is formed by a continuous curve and has no straight sides or vertices (corners).
In contrast, the Square, Triangle, and Rectangle are all polygons, which are defined as closed figures formed by a finite number of straight line segments.

Option A: The Square is a polygon with four straight sides and four vertices. This shares the core properties of being a polygon with the Triangle and Rectangle, making it part of the main group.
Option B: The Triangle is a polygon with three straight sides and three vertices. It fits the pattern of being a polygon along with the Square and Rectangle.
Option C: The Rectangle is a polygon with four straight sides and four vertices. It belongs to the group of polygons with the Square and Triangle.

Visual 1: Diagram - An image showing a square, a triangle, a rectangle, and a circle side-by-side. This allows for an easy visual comparison of their properties, highlighting the straight lines and corners of the polygons versus the continuous curve of the circle.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning - Odd One Out (Geometric Shapes) as background academic context rather than a clinical decision trigger.
While not a clinical question, the underlying skill of pattern recognition is crucial in nursing. It's the same cognitive process used to identify an anomalous symptom or lab value that doesn't fit a patient's expected clinical presentation.
This 'odd one out' thinking helps nurses to quickly spot deviations from the norm, which can be early indicators of a patient's deteriorating condition or a complication.
What if? - If the options were 'Circle', 'Oval', 'Ellipse', and 'Square', the odd one out would be the Square. In that case, the pattern would be 'curved shapes' (conic sections), and the square would be the only polygon.

How to Approach the Question

First, identify the category of the items presented. In this question, all items are common geometric shapes.
Next, analyze the fundamental properties of each shape. Consider attributes like: type of lines (straight vs. curved), number of sides, and number of corners (vertices).
Look for a common property that is shared by most of the options. Here, you can observe that the Square, Triangle, and Rectangle are all composed of straight line segments and have distinct corners.
Identify the option that does not share this common property. The Circle is the only shape made from a continuous curve and has no straight sides or corners.
Conclude that the item lacking the common property is the 'odd one out'.

Concept Tested & Keywords

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