Solution:The pattern followed here is :{(1st number × 2) + 4} = 2nd number
(16 : 36) → {(16 × 2) + 4} ⇒ 32 + 4 = 36
(9 : 22) → {(9 × 2) + 4} ⇒ 18 + 4 = 22
Similarly,
(? : 50) → {(x × 2) + 4} = 50
⇒ 2x = 50 - 4
⇒ x = 46 ÷ 2
⇒ x = 23
Hence, "23" is the correct answer.