Instructions

In each of the following questions, select the related letters/word/number fromthe given alternatives.

Question 152

13 : 19 : : 21 : ?

Solution

Expression = 13 : 19 : : 21 : ?

Each digit is raised to the power of 2

Eg = $$1^2=1$$ and $$3^2=9$$

Similarly, $$2^2=4$$ and $$1^2=1$$

Thus, 21 : 41

=> Ans - (A)

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