Answer: The rule of each row is to take the first number x the second number, subtract that result from the first number to get the third number. Specifically as follows:    (2 x 11) – 2 = 20    (4 x 9) – 4 = 32    (7 x 8) – 7 = 49    (4 x 10) – 4 = 36    According to this rule, we have the answer we need to find is 36.