Question 6What number should replace the question mark? Two blocks of numbers, each with three columns, are: (7 6 5 / 4 9 2 / 1 3 7 / 3 8 4 / 5 4 2) and (7 6 3 / 8 1 9 / 3 2 7 / 9 9 5 / 3 2 ?). Answer with a natural number.