132
24
24
24
30!
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.
81
12 because they are decreasing by increments of 6
24 for each number you add 5 and then subtract 2. 19 plus 5 is 24.
13 18 16 21 19 24 22 27 25 ... . This series consists of adding 5 to the first number and subtracting 2 from the next number, repeating the sequence in that order.
The rule is: add 5, subtract 2, add 5, subtract 2, . . . Next number is 24.
90 because 66+24 = 90
21-3=18 18/2=9 9*3=27 that is the pattern so after the 36 it should be 33