The four pieces of rock must weigh 1 pound, 3 pounds, 9 pounds, and 27 pounds.
Listed below are combinations that will give the farmer each 1 pound increment from 1 pound to 40 pounds.
Left Platter Right Platter Weight
1 - 1
3 1 2
3 - 3
3 and 1 - 4
9 3 and 1 5
9 3 6
9 and 1 3 7
9 1 8
9 - 9
9 and 1 - 10
9 and 3 1 11
9 and 3 - 12
9 and 3 and 1 - 13
27 9 and 3 and 1 14
27 9 and 3 15
27 and 1 9 and 3 16
27 9 and 1 17
27 9 18
27 and 1 9 19
27 and 3 9 and 1 20
27 and 3 9 21
27 and 3 and 1 9 22
27 3 and 1 23
27 3 24
27 and 1 3 25
27 1 26
27 - 27
27 and 1 - 28
27 and 3 1 29
27 and 3 - 30
27 and 3 and 1 - 31
27 and 9 3 and 1 32
27 and 9 3 33
27 and 9 and 1 3 34
27 and 9 1 35
27 and 9 - 36
27 and 9 and 1 - 37
27 and 9 and 3 1 38
27 and 9 and 3 - 39
27 and 9 and 3 and 1 - 40

      

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