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: B
Explanation
The correct answer is option 2 i.e. 128 : 16.
Logic: 2nd number × 8 - 1 = 1st number
Option 2) 128 : 16 ⇒ 16 × 8 - 1 = 128 - 1 = 127 (Not equal to 128)
Except 128 : 16, All number-pairs follow the same pattern.