Balance Scale
using  distances less than or equal to 20 and 8 or few total blocks for weights.

  # of blocks x distance equals # of blocks x distance equals product total blocks
1 1 x 2 = 2 x 1 = 2 3
2 1 x 4 = 2 x 2 = 4 3
3 1 x 6 = 2 x 3 = 6 3
4 1 x 8 = 2 x 4 = 8 3
5 1 x 10 = 2 x 5 = 10 3
6 1 x 12 = 2 x 6 = 12 3
7 1 x 14 = 2 x 7 = 14 3
8 1 x 16 = 2 x 8 = 16 3
9 1 x 18 = 2 x 9 = 18 3
10 1 x 20 = 2 x 10 = 20 3
11 1 x 3 = 3 x 1 = 3 4
12 1 x 6 = 3 x 2 = 6 4
13 1 x 9 = 3 x 3 = 9 4
14 1 x 12 = 3 x 4 = 12 4
15 1 x 15 = 3 x 5 = 15 4
16 1 x 18 = 3 x 6 = 18 4
17 1 x 4 = 4 x 1 = 4 5
18 1 x 8 = 4 x 2 = 8 5
19 1 x 12 = 4 x 3 = 12 5
20 1 x 16 = 4 x 4 = 16 5
21 1 x 20 = 4 x 5 = 20 5
22 1 x 5 = 5 x 1 = 5 6
23 1 x 10 = 5 x 2 = 10 6
24 1 x 15 = 5 x 3 = 15 6
25 1 x 20 = 5 x 4 = 20 6
26 1 x 6 = 6 x 1 = 6 7
27 1 x 12 = 6 x 2 = 12 7
28 1 x 18 = 6 x 3 = 18 7
29 1 x 7 = 7 x 1 = 7 8
30 1 x 14 = 7 x 2 = 14 8
31 2 x 3 = 3 x 2 = 6 5
32 2 x 6 = 3 x 4 = 12 5
33 2 x 9 = 3 x 6 = 18 5
34 2 x 12 = 3 x 8 = 24 5
35 2 x 15 = 3 x 10 = 30 5
36 2 x 18 = 3 x 12 = 36 5
37 2 x 2 = 4 x 1 = 4 6
38 2 x 4 = 4 x 2 = 8 6
39 2 x 6 = 4 x 3 = 12 6
40 2 x 8 = 4 x 4 = 16 6
41 2 x 10 = 4 x 5 = 20 6
42 2 x 12 = 4 x 6 = 24 6
43 2 x 14 = 4 x 7 = 28 6
44 2 x 16 = 4 x 8 = 32 6
45 2 x 18 = 4 x 9 = 36 6
46 2 x 20 = 4 x 10 = 40 6
47 2 x 5 = 5 x 2 = 10 7
48 2 x 10 = 5 x 4 = 20 7
49 2 x 15 = 5 x 6 = 30 7
50 2 x 20 = 5 x 8 = 40 7
51 2 x 3 = 6 x 1 = 6 8
52 2 x 6 = 6 x 2 = 12 8
53 2 x 9 = 6 x 3 = 18 8
54 2 x 12 = 6 x 4 = 24 8
55 2 x 15 = 6 x 5 = 30 8
56 2 x 18 = 6 x 6 = 36 8
57 3 x 4 = 4 x 3 = 12 7
58 3 x 8 = 4 x 6 = 24 7
59 3 x 12 = 4 x 9 = 36 7
60 3 x 16 = 4 x 12 = 48 7
61 3 x 20 = 4 x 15 = 60 7
62 3 x 5 = 5 x 3 = 15 8
63 3 x 10 = 5 x 6 = 30 8
64 3 x 15 = 5 x 9 = 45 8
65 3 x 20 = 5 x 12 = 60 8