12 is related to 61 following a certain logic. Following the same logic, 15 is related to 76. To which of the following is 16 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. 81.
12 is related to 61 → 12 × 5 + 1 = 61
15 is related to 76 → 15 × 5 + 1 = 76
Similarly, 16 is related → 16 × 5 + 1 = 81