Classification: Word, Number and Odd one Classification Formula and Tricks with Problem (Question) and Solutions

Classification means to assort the item of a given group on the basis of a certain common quality.

 Question generally based on alphabetical order, group, square cube, currency, capital, etc

TYPE - 1 Odd One Classification

In each of the following questions, four words have been given, out of which three are alike in some manner and the fourth one is different. Choose out the odd one.

Ex 1-

 (a) Apple

(b) Rose

(c) Lotus

(d) Lily

Sol. (a) All except Apple are flowers.

Ex 2-

(a) Daman

(b) Pondicherry

(c) Chandigarh

(d) Lucknow

Sol. (d) All except Lucknow are union Territories.



(a) Goat

(b) Puppy




(a) Eye

(b) Tongue

(c) Nose

(d) Brain


TYPE - 2 Word Classification

In this type of classification, different objects are classified on the basis of common features / properties – names, places, uses, situations, origin, etc

In each of the following questions, certain pairs of words are given, out of which the words in all pairs except one, bear a certain common relationship. Choose the pair in which the words are differently related.


(a) Car : Road
(b) Ship : Sea
(c) Rocket : Space
(d) Aeroplane : Pilot

In all other pairs, first is the means of transport on the medium denoted by the second.


(a) Beautician : Parlour
(b) Chemist : Medicine
(c) Lawyer : Court
(d) Engineer : Site

In all other pairs, second is the place where first works.

TYPE - 3 Odd  Number Classification

In each of the following questions, four numbers are given out of which three are like in some manner while one is different.


(a) 21

(b) 69

(c) 81

(d) 83

Each of the numbers except 83, is divisible by 3.


(a) 5788

(b) 5878

(c) 6482

(d) 9748

In all other numbers, the sum of the digits is 28.


(a) 27
(b) 64
(c) 125
(d) 144
(a) 11
(b) 13
(c) 15
(d) 17
(a) 1236
(b) 2346
(c) 4566
(d) 5686
(a) 10
(b) 11
(c) 15
(d) 16

TYPE - 4 Number Classification

In this type, numbers are classification in a group using a particular method or rule. Rules or methods used for such classification may be based on mathematical operations.

Choose the odd number pair group in each of the following
questions :


(a) 34 – 43 (b) 55 – 62
(c) 62 – 71 (d) 83 – 92

In all other pairs, second number is 9 more than the first.


(a) 2 – 8 (b) 3 – 27
(c) 4 – 32 (d) 5 – 125

In all other pairs, second number is the cube of the first.


(a) 80 – 9 (b) 64 – 8
(c) 36 – 6 (d) 49 – 7

In all other pairs, one number is the square of the other.

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