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.

(16, 112) (17, 119) (18, 128) (15, 105)

(18, 128)

The logic followed here is: Ist number × 7 = second number AS (16, 112) = 16 × 7 = 112 (17, 119) = 17 × 7 = 119 (18, 128) = 18 × 7 = 126 ≠ 128 (15, 105) = 15 × 7 = 105