Find the missing number in the logic grid based on its rows: Row 1 is (20, 9, 31). Row 2 is (15, 5, 25). Row 3 is (19, 1, ?).

Find the missing number in the logic grid based on its rows: Row 1 is (13, 2, 24). Row 2 is (15, 3, 27). Row 3 is (10, 9, ?).

Find the missing number in the logic grid based on its rows: Row 1 is (11, 8, 19). Row 2 is (5, 8, 13). Row 3 is (13, 15, ?).

Find the missing number in the logic grid based on its rows: Row 1 is (9, 2, 18). Row 2 is (6, 3, 18). Row 3 is (7, 2, ?).

Find the missing number in the logic grid based on its rows: Row 1 is (4, 5, 20). Row 2 is (2, 9, 18). Row 3 is (7, 8, ?).

Find the missing number in the logic grid based on its rows: Row 1 is (3, 9, 27). Row 2 is (4, 9, 36). Row 3 is (6, 4, ?).

Person A is exactly 3 years older than Person B. If the sum of their current ages is 33, what is Person A's current age?