Number Analogy

In 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.

Choose the best alternative.

7 : 56 : : 9 : ?

Answer: Option C

Explanation:

The relationship is x : x (x + 1).

i.e. x : x ²+ x.

So 9 : 9²+ 9 = 81 + 9 = 90.

Aavesh said: (Jul 05,2021)

I can't understand please explain it please
PLEASE REPLY said: (Sep 07,2021)

Hi I feel the solution is wrong you are missing to put to the power sign
DHITI said: (Aug 14,2022)

PLS EXPLAIN IT AGAIN
Trupti said: (Aug 03,2023)

My method is x(x 1) = 7(7 1) = 7*8 = 56 then 9(9 1) = 9*10 = 90

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