Question 1

Find the odd one out:
Sparrow, Eagle, Penguin, Parrot

Accepted Answer

Sparrow, Eagle, and Parrot are all flying birds capable of sustained flight. Penguin is a flightless bird that swims instead of flying.

Question 2

Find the odd one out:
Rose, Tulip, Sunflower, Carrot

Accepted Answer

Rose, Tulip, and Sunflower are all flowering plants that bloom with visible petals. Carrot is a root vegetable that grows underground and is not primarily valued for its flowers.

Question 3

Find the odd one out:
Orange, Banana, Carrot, Apple

Accepted Answer

Orange, Banana, and Apple are all fruits. Carrot is a vegetable (specifically a root vegetable), not a fruit.

Question 4

Which one of the following is the odd one out?

A) Carrot
B) Potato
C) Brinjal
D) Tomato

Accepted Answer

Carrot is the odd one out because it is a root vegetable (grows underground as a root), while Potato, Brinjal, and Tomato are all stem/fruit vegetables. Potato grows as a tuber (modified stem), Brinjal and Tomato are fruits botanically. The classification is based on the plant part that is consumed.

Question 5

Which one of the following is the odd one out?
Pencil, Pen, Eraser, Sharpener

Accepted Answer

Pencil, Pen, and Sharpener are all writing or writing-related instruments used to create or maintain marks on paper. Eraser is used to remove marks, making it functionally opposite in purpose.

Question 6

Which one of the following does NOT belong to the group?
A) Cricket
B) Tennis
C) Badminton
D) Chess

Accepted Answer

Chess is the odd one out because it is the only game that does NOT require a ball. Cricket, Tennis, and Badminton all use a ball (or shuttlecock in badminton's case, which serves the same function). Chess is a board game played with pieces on a checkered board.

Question 7

Which one of the following does NOT belong to the group?
A) Gold
B) Silver
C) Copper
D) Oxygen

Accepted Answer

Oxygen is the odd one out because it is a non-metal element, while Gold, Silver, and Copper are all precious/valuable metals. Oxygen is a gas at room temperature, whereas the other three are solid metals.

Question 8

Which one of the following is the odd one out?
Sparrow, Penguin, Eagle, Parrot

Accepted Answer

Sparrow, Eagle, and Parrot are all birds that can fly. Penguin is a flightless bird, making it functionally different from the others despite being a bird.

Question 9

Which one of the following does NOT belong to the group?
A) Carrot
B) Potato
C) Tomato
D) Onion

Accepted Answer

Tomato is the odd one out because it is a fruit (botanically), while Carrot, Potato, and Onion are all vegetables (underground root/bulb vegetables). Tomato grows above ground and is botanically classified as a fruit, making it different from the others.

Question 10

Four words are given below. Three of them share a common property. Find the odd one out.
Rose, Lotus, Tulip, Marigold

Accepted Answer

Rose, Tulip, and Marigold are all land plants (terrestrial flowers). Lotus, however, is an aquatic plant that grows in water. Hence, Lotus is the odd one out.

Question 11

Which one of the following is the odd one out?
Doctor, Teacher, Engineer, Patient

Accepted Answer

Doctor, Teacher, and Engineer are all professions—occupations requiring specialized training and credentials. Patient is not a profession but a status or role describing someone receiving medical care.

Question 12

Which one of the following does NOT belong to the group?
A) Sparrow
B) Penguin
C) Ostrich
D) Kiwi

Accepted Answer

Sparrow is the odd one out because it is the only bird that can fly. Penguin, Ostrich, and Kiwi are all flightless birds. Despite being birds, they have lost the ability to fly through evolution.

Question 13

Which one of the following is the odd one out?
Apple, Carrot, Potato, Spinach

Accepted Answer

Carrot, Potato, and Spinach are all vegetables. Apple is a fruit, making it botanically and culinarily distinct from the others.

Question 14

Find the odd one out:
Rose, Lotus, Lily, Cactus

Accepted Answer

Cactus is the odd one out because it is a succulent plant adapted to arid climates with thick, fleshy leaves and spines, while Rose, Lotus, and Lily are flowering plants with delicate petals and require regular water. Cactus is fundamentally different in structure and habitat requirement.

Question 15

Find the odd one out:
Mango, Carrot, Broccoli, Spinach

Accepted Answer

Mango is the odd one out because it is a fruit, while Carrot, Broccoli, and Spinach are all vegetables. Mango grows on trees and contains seeds in a pit, whereas the others are herbaceous plants or plant parts.

Question 16

Find the odd one out:
Sparrow, Penguin, Eagle, Parrot

Accepted Answer

Penguin is the odd one out because it cannot fly, while Sparrow, Eagle, and Parrot are all flying birds. Penguin is a flightless bird adapted for swimming.

Question 17

Find the odd one out:
Piano, Guitar, Flute, Violin

Accepted Answer

Piano and Guitar are string instruments (or keyboard with strings), and Violin is also a string instrument. Flute is a wind instrument that produces sound by air vibration, not string vibration.

Question 18

Four words are given below. Three of them share a common characteristic. Find the odd one out.
Maestro, Virtuoso, Novice, Prodigy

Accepted Answer

Step 1: Analyze each word. 'Maestro' means a highly skilled, distinguished musician or master. 'Virtuoso' means a person with exceptional skill in a field, especially music. 'Prodigy' means a young person with extraordinary talent or ability. Step 2: All three (Maestro, Virtuoso, Prodigy) refer to someone with outstanding or exceptional talent/skill. Step 3: 'Novice' means a person who is new to or inexperienced in a field — the exact opposite of an expert. Step 4: Therefore, 'Novice' is the odd one out as it denotes a beginner, not an expert.

Question 19

Which one of the following does NOT match the others?

A) Copper
B) Zinc
C) Oxygen
D) Iron

Accepted Answer

Copper, Zinc, and Iron are all metals. Oxygen is a non-metal (a gas at room temperature). Oxygen is the odd one out.

Question 20

In a classification task, which one of the following does NOT belong to the same group as the others?

A) Carrot
B) Potato
C) Radish
D) Tomato

Accepted Answer

Carrot, Potato, and Radish are all root vegetables that grow underground. Tomato is a fruit (botanically) that grows above ground on a vine. Therefore, Tomato is the odd one out.

RPF Sub-Inspector Classification / Odd One Out

Classification / Odd One Out— Rules & Concept

Key Points to Remember

Exam-Specific Tips

Classification / Odd One Out — Practice Questions

60-Second Revision — Classification / Odd One Out