Solution:The pattern followed here is :{1st Number × (1st number + 1)} = 2nd Number
(15, 240) → {15 × (15 + 1)} ⇒ (15 × 16) = 240
(11, 132) → {11 × (11 + 1)} ⇒ (11 × 12) = 132
(16, 272) → {16 × (16 + 1)} ⇒ (16 × 17) = 272
But,
(13, 180) → {13 × (13 + 1)} ⇒ (13 × 14) = 182 ≠ 180
Hence, (13, 180) is the correct answer.