The sum of each row (or column or square) is 45.
There are 9 such rows (or columns or squares)
So grand total = 45*9 = 405
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The answer is zero !
The sum of all odd numbers 1 to 120,000 is 14,400,000,000.
The sum is infinite
Sudoku
The sum of all the numbers 1 through 200 is 20,100.