This section deals with two types of questions:

a. Choosing a number related to a given number in the same manner as the two numbers of another given pair are related to each other

b.  Choosing a similarly related pair as the given number pair on the basis of the relation between the numbers in each pair;

c. Choosing a number similar to a group of numbers on the basis of certain common properties that they possess;

d.  Choosing a number set similar to a given number set.

 

1)

7 : 56 : : 9 : ?


A) 63

B) 81

C) 90

D) 99

Answer:

Option C

Explanation:

The relationship is x : x (x + 1). Hence the answer is (c).