Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
21 : 529 :: 25 : 729 :: 17 : ?
Answer & explanation
Correct answer: option 4
21 : 529 :: 25 : 729 :: 17 : ?
The logic;
21 : 529
21 +2= 23
\( {23 }^{2 } \) = 529
And,
25 : 729
25 +2= 27
\( {25}^{2 } \) = 729
Similarly,
17 : ?
17 +2= 19
\( {19}^{2 } \) = 361