Select the option that is related to the fifth number in the same way as the first number is related to the second number and the third number is related to the fourth number.
33 : 121 :: 27 : 81 :: 45 : ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 225.
Logic: (1st number ÷ 3)2 = 2nd number
33 : 121 ⇒ (33 ÷ 3)2 = (11)2 = 121
27 : 81 ⇒ (27 ÷ 3)2 = (9)2 = 81
Similarly, 45 : ? ⇒ (45 ÷ 3)2 = (15)2 = 225