1.
Count backwards by 6s: 36, 30, ___, 18, 12, 6
2.
Count backwards by 6s: 54, ___, 42, 36, 30, 24
3.
Count backwards by 4s: 36, 32, ___, 24, 20, 16
4.
Count backwards by 5s: 35, 30, 25, 20, ___, 10
5.
Count backwards by 4s: 32, 28, ___, 20, 16, 12
6.
Count backwards by 4s: 32, 28, 24, 20, ___, 12
7.
Count backwards by 4s: 28, ___, 20, 16, 12, 8
8.
Count backwards by 6s: 30, ___, 18, 12, 6, 0
9.
Count backwards by 4s: 28, 24, 20, ___, 12, 8
10.
Count backwards by 5s: 30, 25, ___, 15, 10, 5
11.
Count backwards by 5s: 25, 20, 15, ___, 5, 0
12.
Count backwards by 6s: 54, 48, 42, 36, ___, 24
13.
Count backwards by 6s: 36, 30, ___, 18, 12, 6
14.
Count backwards by 4s: 36, 32, 28, 24, ___, 16
15.
Count backwards by 6s: 30, 24, 18, 12, ___, 0
16.
Count backwards by 4s: 32, 28, 24, ___, 16, 12
17.
Count backwards by 6s: 30, 24, 18, ___, 6, 0
18.
Count backwards by 5s: 40, 35, ___, 25, 20, 15
19.
Count backwards by 5s: 30, 25, 20, 15, ___, 5
20.
Count backwards by 4s: 24, 20, 16, 12, ___, 4