Three of the following numbers are alike in a certain way and one is different. Pick the odd one out.
(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: D
Explanation
The correct answer is option 4 i.e. 33 – 72.
Option 1: 64 – 84
84 - 64 = 20 (even number)
Option 2: 72 – 168
168 - 72 = 96 (even number)
Option 3: 66 – 154
154 - 66 = 88 (even number)
Option 4: 33 – 72
72 - 33 = 39 (odd number)
Hence, 33 – 72 is the odd one.