Which is the odd one out in the options?

Appeared in: NORCET 8 Prelims-2025

Explanation

The question asks to identify the option that does not belong with the others.
Gram is a unit used to measure mass (the amount of matter in an object).
The other three options—Kilometer, Inches, and Yard—are all units used to measure length or distance.
Since Gram measures a different fundamental physical quantity (mass) than the others (length), it is the odd one out.

Option A: Kilometer is a unit of length, which fits the pattern of the other two length units (Inches and Yard).
Option B: Inches is a unit of length, similar to Kilometer and Yard.
Option C: Yard is a unit of length, fitting the category established by Kilometer and Inches.

Visual 1: Infographic - A simple chart visually separating common units into categories like 'Length' (ruler icon), 'Mass' (weight scale icon), and 'Volume' (beaker icon). This would clearly show Gram under 'Mass' and the others under 'Length'.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification of Units of Measurement as background academic context rather than a clinical decision trigger.
While this is a general reasoning question, understanding units is critical in nursing. A mix-up between units of mass (like grams or milligrams) and other units can lead to severe medication errors.
For example, administering a drug dosage in grams (g) when it was prescribed in milligrams (mg) would result in a 1000-fold overdose, which could be fatal.
What if? If the options were 'Gram', 'Kilogram', 'Milligram', and 'Liter'? The odd one out would be 'Liter', as it's a unit of volume, while the other three are units of mass.

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 individually: Kilometer, Inches, Yard, and Gram.
Identify the common characteristic or category that links most of the options. In this case, notice that Kilometer, Inches, and Yard are all used to measure length or distance.
Look for the option that does not fit this common category. 'Gram' is used to measure mass, not length.
Conclude that 'Gram' is the odd one out because it belongs to a different category of measurement (mass) compared to the others (length).

Concept Tested & Keywords

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Practise the full NORCET 8 Prelims-2025

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