Three of the following four options are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?
(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/subtracting/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. 22 – 13 – 85.
Logic: (1st number + 2nd number) × 2 + 2nd number = 3rd number
Except for '22 – 13 – 85', all number pairs follow the same logic.
While, 22 – 13 – 85 → (22 + 13) × 2 + 13 = 35 × 2 + 13 = 83 ≠ 85