Select the option that is related to the third number in the same way as the second number is related to the first number.
12: 140:: 15:?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4, i.e., 221.
12: 140
(12)2 = 144 - 4 = 140
Similarly, 15: 221
(15)2 = 225 - 4 = 221