Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
Answer & explanation
Correct answer: option 4
The logic followed here is:
22 : 490 → 222 + 6 = 490
25 : 631 → 252 + 6 = 631
21 : 447 → 212 + 6 = 447
30 : 908 →302 + 6 = 906 ≠ 908 (odd)