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.

1 : 1 : : 25 : ?

A. 26
B. 125
C. 240
D. 625
Answer: D . 625

Justification: The relationship is x : x2.