11 is related to 78 following a certain logic. Following the same logic, 6 is related to 43. To which of the following is 31 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: C
Explanation
The correct answer is option 3 i.e. 218.
11 → 11 × 7 + 1 = 78
6 → 6 × 7 + 1 = 43
Similarly, 31 → 31 × 7 + 1 = 218