1
Fill in: 9, 18, 27, 36, 45, __ =
2
Fill in the blanks: 7, __, 31, 43, __ =
3
Fill in: 24, 36, 48, 60, 72, __ =
4
What comes next: 135, 144, 153, 162, __ =
5
Fill in the blanks: 1, __, 23, 34, __ =
6
Fill in the blanks: 1, 13, 25, __, __ =
7
Fill in the blanks: 5, __, 21, 29, __ =
8
Fill in: 8, 16, 24, 32, 40, __ =
9
What comes next: 99, 108, 117, 126, __ =
10
What comes next: 154, 143, 132, 121, __ =
11
Fill in the blanks: 10, 17, 24, __, __ =
12
Fill in: 33, 44, 55, 66, 77, __ =
13
Fill in the blanks: 10, __, 32, 43, __ =
14
3, 14, 25, 36. What is the rule? =
15
What comes next: 144, 152, 160, 168, __ =
16
What comes next: 98, 91, 84, 77, __ =
17
Fill in the blanks: 2, __, __, 38, 50 =
18
Fill in the blanks: 9, 20, __, __, 53 =
19
9, 21, 33, 45. What is the rule? =
20
Fill in: 16, 24, 32, 40, 48, __ =