1-20
What is the beginning number before 1
0
What is before 20 and after 18
19
What number is after 39
40
What number is after 81
82
150,151,152,153___,155,156
154
What number is after 17
18
20,21,22__,24,25,__
23,26
What numbers comes after 50
51
81,82,__,84
83
___,199,200
198
What is after 11
12
What number is before 19
18
41__,___,44,45,46
42,43
What number is after 133
134
What number is after 141
142
17,___,___,___,21
18,19,20
What is after 29
30
What number is after 79
80
What number is before 82 and after 80
81
___,151,___,153
150,152
21,__,__,24,__
22,23,25
What number is before 28 and after 26
27
__,76__,78,___
75,77,79
___,___,149,150
147,148
___,___,195,___,___,198,___ ____
193,194,196,197,199,200