Number Analogy

Number Analogy-In this type of Analogy, numbers are given in a pair or group on one side. We have to find the relationship between them and then find the number or group of numbers which will replace the question mark in the other pair on the other side.

In Number analogy section deals with two types of questions:

  • Choosing a similarly related pair as the given number pair on the basis of the relation between the numbers in each pair.
  • Choosing a number similar to a group of numbers on the basis of certain common properties that they possess.

Example : In each of the following questions find out the alternative which will replace the question mark. 

  1. 14675: 36897:: 35275: _?_
  1. 57697
  2. 57456
  3. 57497
  4. 46885

Solution : 57497

Relation between 14675: 36897. Add two in all the digits of the first term to get the second element.

So, 35275: 57497.

2. 91 : 64 :: _?_ : 36

  1. 48
  2. 98
  3. 61
  4. 93

 Solution : 93

Relation between 91 :64

9 – 1 = 8 , 8 square = 64

So, 9 – 3 = 6.  6 square = 36

Example : Select the pair in which the numbers are similarly related as in the given pair.

1. 27 : 9

A. 64 : 8
B. 125 : 5
C. 135 : 15
D. 729 : 81

Solution : 729 : 81

The relationship is x³ : x². 

2. 11 : 1210

A. 6 : 216
B. 7 : 1029
C. 8 : 448
D. 9 : 729

Solution : 8 : 448

The relationship is x : (x³ - x²). 

Example : Choose that set of numbers from the four alternative sets, that is similar to the given set.
Given set : (2, 14, 16)

A. (2, 7, 8)
B. (2, 9, 16)
C. (3, 21, 24)
D. (4, 16, 18)

Solution : (3, 21, 24)

In each set, 2nd number = (1st number × 7) and 3rd number = (1st number × 8)