Question 9

In the following question, select the related number from the given alternatives.
17 : 289 :: 21 : ?

Solution

The logic here is

$$17^2=289$$

Similarly,

$$21^2=441$$

$$\therefore\ $$441 is related to 21 in the same way 289 is related to 17

Hence, the correct answer is Option C

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In the following question, select the related number from the given alternatives.17 : 289 :: 21 : ?