The second number in the given number pairs is obtained by performing certain mathematical operations (s) on the first number. The same operation(s) is/are followed in all the number pairs except one. Find that odd number pair.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 18 : 42.
Logic: (1st number × 2) + 4 = 2nd number
All follow the same logic except for 18 : 42 . 18 : 42 = 18 × 2 + 4 = 40 ≠ 42