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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 : 80 : : 100 : ?

Option:
A. 901
B. 1009
C. 9889
D. 9999
Answer: D . 9999

Justification: The relationship is x : (x2 - 1).

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