Try to connect the first number in each row to the other two. Row 1: 5 × 2 = 10, and 10 + 1 = 11 (the first number). Row 2: 13 × 2 = 26, and 26 + 1 = 27 (the first number). The rule is: first number = (2nd number × 3rd number) + 1. Apply this to Row 3: 7 × 3 = 21, and 21 + 1 = 22. So the missing number is 22, option (4).