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.

12 : 1740 6 : 222 11 : 1342 7 : 360

7 : 360

The logic followed here is : Ist number3  + ist number = second number 12 : 1740 -  123 + 12 = 1740 6 : 222     -   63 + 6 = 222 11 : 1342 -   113 + 11 = 1342 7 : 360     -   73 + 7 = 350 ≠ 360