Count by 2s
2, 4, 6, __, 10
8
5, 10, ___, 20, 25
15
10, 20, ___, 40, 50
30
3, 6, ___, 12
9
10, 12, ___, 16, 18
14
25, 30, 35, ___,45
40
80, 70, ___, 50, 40
60
33, 36, ___, 41
39
44, 46, 48, ___, 52
50
25, 20, 15, ___, 5
10
55, 65, ___, 85, 95
75
15, ___, 21, 24, 27
60, 58, 56, ___,52
54
70, 65, ___, 55, 50
60
61, 71, 81, __, 101
91
30, 27, ____, 21
24
34, ___, 30, 28, 26
32
40,___,30, 25, 20
35
96, 86, 76, ___, 56
66
15, 12, 9, ___, 3