Question 30

In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.

Solution

The pattern followed for the diagonally opposite numbers are = $$x\times n+(n-1)$$, where $$n$$ is a natural number starting from 2.

(1,3) = $$1\times2+(2-1)=2+1=3$$

(4,14) = $$4\times3+(3-1)=12+2=14$$

(9,39) = $$9\times4+(4-1)=36+3=39$$

Similarly, $$16\times5+(5-1)=80+4=84$$

=> Ans - (A)

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