22 is related to 43 following a certain logic. Following the same logic,35 is related to 69. To which of the following is 81 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 / subtracting / 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.)
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 161.
22 is related to 43 → 22 × 2 - 1 = 43
35 is related to 69 → 35 × 2 - 1 = 69
Similarly, 81 is related → 81 × 2 - 1 = 161