Count back by 1's
1 less than 5
4
1 more than 20
21
2 more than 2
4
1 less than 85
84
1 more than 21
22
1 less than 10
9
1 more than 54
55
2 more than 3
5
1 less than 24
23
1 more than 87
88
1 less than 50
49
1 more than 88
89
2 more than 8
10
1 less than 79
78
1 more than 59
60
1 less than 45
44
1 more than 90
91
2 more than 17
19
1 less than 54
53
1 more than 24
25
1 less than 110
109
1 more than 114
115
2 more than 18
20
1 less than 113
112
1 more than 101
102