Number analogy section deals with two types of questions:
I. Choosing a similarly related pair as the given number pair on the basis of the relation between the numbers in each pair.
II. Choosing a number similar to a group of numbers on the basis of certain common properties that they possess.
9 : 8 : : 16 : ?
The relationship is x^ : (x -1)^+1.
Now, 16 = 42.
So, required number \ (4 – 1)2+1= 33 = 27.