73 - 27 = 46
91 - 63 = 28
56 - 38 = 18
81 - 24 = 57
61 - 25 = 36
55 - 35 = 20
84 - 48 = 36
71 - 16 = 56
96 - 56 = 40
74 - 37 = 37
Piramida po lewej:
13 - 7 = 6
6 + 8 = 14
24 - 14 = 12
12 - 8 = 4
13 + 14 = 27
27+26 = 53
Piramida po prawej:
18 - 7 = 11
37 - 18 = 19
19 - 7 = 12
11 + 2 = 13
18 + 13 = 31
31 + 37 = 68