78 is related to 30 following a certain logic. Following the same logic, 67 is related to 26. To which of the following is 54 related, following the same logic?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 18.
Logic: (Digit Sum of 1st number × 2) = 2nd number
78 : 30 ⇒ (7 + 8) = 15 × 2 = 30
67 : 26 ⇒ (6 + 7) = 13 x 2 = 26
Similarly, 54 : ? ⇒ (5 + 4) = 9 × 2 = 18