Four number-pairs are given out of which three are alike in a certain way and one is different. Select the number-pair that is different from the rest.

24 : 142

The logic followed here is:

second number × 2 : (second number) ²

16 : 64

8 × 2 : (8) ²

16 : 64

34 : 289

17 × 2 : (17) ²

34 : 289

24 : 142

12 × 2 : (12) ²

24 : 144 but 142 (odd)

14 : 49

7 × 2 : (7) ²

14 : 49