SOLUTION: Arrange 127 pennies into 7 stacks so that some combination of the stacks can total up to any amount from 1¢ to 127¢.
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Question 860758:  Arrange 127 pennies into 7 stacks so that some combination of the stacks can total up to any amount from 1¢ to 127¢. 
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
 Arrange 127 pennies into 7 stacks so that some combination of the stacks can total up to any amount from 1¢ to 127¢.
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It's binary counting.  The stacks are
1
2
4
8
16
32
64
 
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