Answer: First pile to second; second to third; third to first:
Pile
Initial number
First move
Second move
Third move
First
11
11-7=4
4
4+4=8
Second
7
7+7=14
14-6=8
8
Third
6
6
6+6=12
12-4=8
Solution:
Show Answer
First pile to second; second to third; third to first:
Pile
Initial number
First move
Second move
Third move