Each of the numbers 1 to 9 is to be placed in a different cell of the grid shown so that the sum of the three numbers in each row is 15. Also, the sum of the two ∗ numbers in each shaded column is to be 15. How many choices are there for the number to be placed in the central cell indicated by *?
Select one option, then click Submit.
0
1
2
3
4
Select an option, then submit.
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