Select the ODD one.

Appeared in: RRB Staff Nurse Mumbai-2015

Explanation

The correct option is Acre because it is a unit of area, which measures a two-dimensional space (length × width).
The other three options—Meter, Yard, and Mile—are all units of length, which measure a one-dimensional distance.
The fundamental difference lies in the physical quantity being measured.
An acre is used to describe the size of a piece of land, while meters, yards, and miles are used to describe the distance from one point to another.

Option A: Meter is a unit of length, similar to Yard and Mile. Therefore, it is not the odd one out.
Option B: Yard is a unit of length, similar to Meter and Mile. Therefore, it is not the odd one out.
Option C: Mile is a unit of length, similar to Meter and Yard. Therefore, it is not the odd one out.

Visual 1: Infographic - A simple diagram showing a straight line labeled 'Length (Meter, Yard, Mile)' next to a square labeled 'Area (Acre)'. This visually distinguishes between one-dimensional and two-dimensional measurements.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Units of Measurement (Length vs. Area) as background academic context rather than a clinical decision trigger.
This question tests foundational numeracy and logical reasoning, which are essential skills for nurses.
Accurate understanding of different units of measurement is crucial for tasks like calculating medication dosages, fluid intake/output, and interpreting patient data, even though these specific units are not directly used in most clinical calculations.
What if the options were Meter, Liter, and Gram? In that case, there would be no odd one out as they are all base units in the metric system for different quantities (length, volume, weight).

How to Approach the Question

First, read the question carefully to understand the task, which is to find the 'odd one out'.
Examine each option: Meter, Yard, Mile, and Acre.
Identify the category or property that each option belongs to. In this case, the property is the type of physical quantity they measure.
Categorize Meter, Yard, and Mile as units of length.
Categorize Acre as a unit of area.
Conclude that Acre is the odd one out because it belongs to a different category (area) than the other three options (length).

Concept Tested & Keywords

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Practise the full RRB Staff Nurse Mumbai-2015

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