Find the missing number in the following figure –

Rule:
👉 Middle number = Difference of the sum of digits of left and right numbers

First row:

• 865 → 8 + 6 + 5 = 19

• 712 → 7 + 1 + 2 = 10

• Difference = 19 − 10 = 9 ✔️

Second row:

• 982 → 9 + 8 + 2 = 19

• 543 → 5 + 4 + 3 = 12

• Difference = 19 − 12 = 7

👉 Missing number = 7 ✔️