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Arithmetic Square (Unknowns) (902)
Other names: Arithmetic Square (Unknown Results)
Instruction:
Place the numbers from 1 to 9 into the cells (a different single number in each cell) so that the indicated equations/relations are correct. Evaluate from left-to-right and top-to-bottom (ignore the usual precedence of the operators).
Some numbers have been replaced with question marks; these numbers must be integers (and can be negative or zero).
It is possible for expressions and partial expressions to be negative or non-integral.