Question 89

Which number will best complete the relationship given below?
25 : 9 :: 16 : ?

Solution

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25 : 9 :: 16 : ?

$$5^{2}$$ : $$3^{2}$$  :: $$4^{2}$$ : $$2^{2}$$ 

in the first group there is a difference  of 2 i.e.5-3,similarly in second group  there will be a difference  of 2 i.e.4-2

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