चिन्हांकित केलेल्या ‘?’ च्या जागी येणारी संख्या भरा.

In each row, the middle number = first × third + 3: 3 × 4 + 3 = 15 and 7 × 5 + 3 = 38. So the missing number = 3 × 5 + 3 = 18.