Answer by joriki for Constructing numbers from basic arithmetic on digits
Division does help, but you have to use seven operations (eight operands) to find a case where it does. Here's a list of all expressions with seven operations with values that can't be obtained with...
View ArticleConstructing numbers from basic arithmetic on digits
I was tooling around over on stackoverflow and happened upon this question. To summarise, given the set of digits $\{1,2,3,4,5,6,7,8,9\}$ and a set of basic arithmetic (binary) operators...
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