Instructions

In question numbers 17 to 24, select the related word/letters/number from the given alternatives.

Question 20

42 : 20 :: 64 : ?

Solution

Expression = 42 : 20 :: 64 : ?

The pattern followed is = $$n:\frac{n}{2}-1$$

Eg :- $$42:\frac{42}{2}-1=42:20$$

Similarly, $$\frac{64}{2}-1=32-1=31$$

=> Ans - (C)

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