31 is related to 152 by certain logic. Following the same logic, 47 is related to 168. To which of the following is 66 related, following the same logic?

(NOTE : Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding /deleting /multiplying etc., to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

Option
a) 180
b) 187
c) 185
d) 190

solution

31 – 152
47 – 168
Logic 31 + 121 = 152
47 + 121 = 168
Apply sum logic
66 + 121 = 187

Correct Answer: b) 187