Select the option that is related to the third term in the same way as the second term is related to the first term and the sixth term is related to the fifth term.
5 : 127 :: 9 : ? :: 7 : 247
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 407.
Logic : (Square of first number × 5) = (Second number - 2)
5 : 127 ⇒
(5)2 × 5 = 127 - 2
25 × 5 = 125
125 = 125
7 : 247 ⇒
(7)2 × 5 = 247 - 2
49 × 5 = 245
245 = 245
Similarly.
9 : ? ⇒
(9)2 × 5 = ? - 2
81 × 5 = ? - 2
405 + 2 = ?
407 = ?
Hence, the correct answer is 407.