The same operation(s) are followed in all the given number pairs except one. Find that odd number pair.
(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 /deleting /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. 11 : 35
Logic: (First number × 3) + 3 = Second number
1. 12 : 39 → (12 × 3) + 3 = 36 + 3 = 39
2. 15 : 48 → (15 × 3) + 3 = 45 + 3 = 48
3. 13 : 42 → (13 × 3) + 3 = 39 + 3 = 42
4. 11 : 35 → (11 × 3) + 3 = 33 + 3= 36 ≠ 35