Can sums all rows equal 17 using 1-9 only once?

Answer 1

If you are thinking of a mgic square, the answer is NO. The nine numbers sum to 45 so if you have three rows with equal sums, that sum can only be 45/3 = 15.

You can have two rows, each adding to 17, and using the digits only once, but you will not use all digits.