Four number pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 4-64.
Logic: (First Number)2 = Second Number
1. 15-225 → (15)2 = 225
2. 19-361 → (19)2 = 361
3. 9-81 → (9)2 = 81
4. 4-64 → (4)2 = 16
Thus, 4-64 is the odd one out.