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A tree farmer planted 10 trees. He planted 5 rows with 4 trees in each row. How?????

Ok ok, here is another...

Draw a tic tac toe board.

now that you have a tic tac toe board.... placing the numbers 1-9 in each of the blocks (using each number only once) in such an order that the sum of three numbers equals 15 in every which direction (horz, diagn, vert).

Enjoy!