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: B
Explanation
The correct answer is option 2 i.e. 22 – 67 – 22.
Logic: 2nd number ÷ 5 + 3rd number ÷ 3 = 1st number
1. 26 – 95 – 21 → 95 ÷ 5 + 21 ÷ 3 = 19 + 7 = 26
2. 22 – 67 – 22 → 67 ÷ 5 + 22 ÷ 3 = 13.5 + 7.3 = 20.8 ≠ 22
3. 20 – 15 – 51 → 15 ÷ 5 + 51 ÷ 3 = 3 + 17 = 20
4. 16 – 45 – 21 → 45 ÷ 5 + 21 ÷ 3 = 9 + 7 = 16