1
Fill in: 27, 36, 45, 54, 63, __ =
2
Fill in the blanks: 3, __, 21, __, 39 =
3
Fill in the blanks: 6, 17, __, __, 50 =
4
7, 14, 21, 28. What is the rule? =
5
87, 79, 71, 63. What is the rule? =
6
37, 25, 13, 1. What is the rule? =
7
Fill in the blanks: 4, 15, 26, __, __ =
8
Fill in the blanks: 2, __, 16, __, 30 =
9
Fill in the blanks: 6, 17, __, __, 50 =
10
Fill in: 27, 36, 45, 54, 63, __ =
11
Fill in the blanks: 9, 18, __, __, 45 =
12
Fill in the blanks: 10, 19, __, __, 46 =
13
What comes next: 180, 189, 198, 207, __ =
14
4, 13, 22, 31. What is the rule? =
15
What comes next: 9, 18, 27, 36, __ =
16
Fill in the blanks: 9, __, 31, __, 53 =
17
9, 21, 33, 45. What is the rule? =
18
What comes next: 120, 132, 144, 156, __ =
19
47, 38, 29, 20. What is the rule? =
20
What comes next: 117, 126, 135, 144, __ =