Question
5, 6, 7, 8, 9

Answer n + 4

Question
5, 6, 7, 8, 9

Answer n + 4

Question
6, 11, 16, 21, 26

Answer 5 n + 1

Question
2, 3, 4, 5, 6

Answer n + 1

Question
6, 9, 12, 15, 18

Answer 3 n + 3

Question
8, 13, 18, 23, 28

Answer 5 n + 3

Question
-2, 1, 4, 7, 10

Answer 3 n − 5

Question
0, 4, 8, 12, 16

Answer 4 n − 4

Question
34, 26, 18, 10, 2

Answer 42 − 8 n

Question
59, 69, 79, 89, 99

Answer 10 n + 49

Question
55, 60, 65, 70, 75

Answer 5 n + 50

Question
9, 6, 3, 0, -3

Answer 12 − 3 n

Question
7, 16, 25, 34, 43

Answer 9 n − 2

Question
-6, -16, -26, -36, -46

Answer 4 − 10 n

Question
29, 38, 47, 56, 65

Answer 9 n + 20

Question
42, 44, 46, 48, 50

Answer 2 n + 40

Question
-9.5, -10, -10.5, -11, -11.5

Answer − 0.5 n − 9

Question
18, 16.5, 15, 13.5, 12

Answer 19.5 − 1.5 n

Question
19, 21.5, 24, 26.5, 29

Answer 2.5 n + 16.5

Question
16, 19.5, 23, 26.5, 30

Answer 3.5 n + 12.5