Question 1

Which one of the following does NOT belong to the group?
A) Triangle
B) Square
C) Pentagon
D) Circle

Accepted Answer

Circle is the odd one out because it is the only shape with a curved boundary, while triangle, square, and pentagon are all polygons with straight sides and vertices (corners).

Question 2

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

Accepted Answer

Penguin is the odd one out because it cannot fly, while sparrow, parrot, and peacock are all birds capable of flight. Penguin is a flightless bird adapted for swimming.

Question 3

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 that grow underground (root vegetables). Tomato grows above ground on a vine.

Question 4

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 metals with high economic value and used in jewelry and industry.

Question 5

In a classification task, five items are presented: Sparrow, Penguin, Ostrich, Bat, Eagle. Four of these items share a common property. Which one is the ODD ONE OUT?

Accepted Answer

The odd one out is Bat. Sparrow, Penguin, Ostrich, and Eagle are all birds (Class Aves), characterized by feathers, laying eggs, and having wings. Bat is a mammal (Class Mammalia), characterized by fur, producing milk for offspring, and having membranous wings. Although bats have wings and can fly like birds, they belong to a different biological class and lack the defining characteristics of birds such as feathers and egg-laying reproduction.

Question 6

Find the odd one out:
A) Penguin
B) Ostrich
C) Kiwi
D) Parrot

Accepted Answer

Penguin, Ostrich, and Kiwi are all flightless birds that have evolved to lose the ability to fly. Parrot is a flying bird capable of sustained flight and is not flightless.

Question 7

Find the odd one out:
A) Violin
B) Guitar
C) Piano
D) Flute

Accepted Answer

Violin, Guitar, and Piano are all string instruments that produce sound through vibrating strings. Flute is a wind instrument that produces sound through air vibration across an opening, not through strings.

Question 8

Find the odd one out:
A) Tomato
B) Carrot
C) Potato
D) Cucumber

Accepted Answer

Carrot, Potato, and Cucumber are all vegetables consumed as food. Tomato is botanically a fruit (the ripened ovary of a flowering plant) but is culinarily classified as a vegetable. However, in strict botanical classification, Tomato is the only true fruit in the group, making it the odd one out.

Question 9

Find the odd one out:
A) Lawyer
B) Doctor
C) Engineer
D) Shopkeeper

Accepted Answer

Lawyer, Doctor, and Engineer are all licensed professionals who require formal higher education and professional certification to practice. Shopkeeper is a business occupation that typically does not require formal professional licensing or higher education credentials.

Question 10

Find the odd one out:
A) Emerald
B) Sapphire
C) Diamond
D) Marble

Accepted Answer

Emerald, Sapphire, and Diamond are all precious gemstones used in jewelry and valued for their rarity and hardness. Marble is a metamorphic rock used primarily in construction and sculpture, not classified as a precious gemstone.

Question 11

In a classification task, which one does NOT belong to the group?

A) Emerald
B) Sapphire
C) Diamond
D) Platinum

Accepted Answer

Emerald, Sapphire, and Diamond are all precious gemstones (crystalline minerals valued for jewelry). Platinum is a precious metal, not a gemstone. The classification principle is: gemstones vs. metals.

Question 12

Which word does NOT fit the logical pattern?

A) Ephemeral
B) Transient
C) Evanescent
D) Permanent

Accepted Answer

Ephemeral, Transient, and Evanescent all mean 'lasting for a very short time' or 'fleeting.' Permanent means 'lasting indefinitely' or 'enduring.' The classification principle is: words meaning 'short-lived' vs. a word meaning 'long-lasting/enduring.'

Question 13

In a classification task, five items are presented: (1) Thermometer, (2) Barometer, (3) Hygrometer, (4) Speedometer, (5) Anemometer. Four of these belong to the same category. Which one is the ODD ONE OUT?

Accepted Answer

The odd one out is Speedometer (option b). Thermometer, Barometer, Hygrometer, and Anemometer all measure atmospheric or weather-related phenomena (temperature, pressure, humidity, and wind speed respectively). Speedometer, however, measures the speed of a vehicle—it is not a meteorological instrument but rather an automotive instrument. The common trap is that students may classify based on the suffix '-meter' (all measure something) rather than the domain of measurement.

Question 14

Which item does NOT belong to the same category?

A) Autobiography
B) Biography
C) Memoir
D) Novel

Accepted Answer

Autobiography, Biography, and Memoir are all non-fiction literary forms that recount real events and real people's lives. A Novel is a work of fiction—it is a narrative created from imagination, even if inspired by real events. The classification principle is: non-fiction life narratives vs. fictional narrative.

SBI PO 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