Instructions

In the following question, select the related number from the given alternatives

Question 20

8 : 63 : : 9 : ?

Solution

Expression = 8 : 63 : : 9 : ?

The numbers are of the form = $$n:n^2-1$$

Eg :- $$(8)^2-1=63$$

Similarly, $$(9)^2-1=80$$

=> Ans - (A)

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