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.

7 : 63 5 : 35 13 : 195 19 : 324

19 : 324

The logic is Ist number : (Ist number + 1)2 - 1 7 : (7 + 1)2 - 1 = 7 : 63 4 : (5 + 1)2 - 1 = 5 : 35 13 : (13 + 1)2 - 1 = 13 : 195 19 : (19 - 1)2  = 19 : 324 (odd)