Four pairs of numbers have been given, out of which three are alike in some manner, while one is different. Choose out the odd one.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 18 : 306.
Logic: (X)2 + X = Y
1. 18 : 306 → (18)2 + 18 = 324 + 18 = 342 ≠ 306
2. 13 : 182 → (13)2 + 13 = 169 + 13 = 182
3. 23 : 552 → (23)2 + 23 = 529 + 23 = 552
4. 25 : 650 → (25)2 + 25 = 625 + 25 = 650
All follow this pattern except for 18 : 306
Hence, the correct answer is 18 : 306.