Add Sum

Smart Square is a classic puzzle game. The Square has four boxes in every rows and four boxes in every column. Fill every box with any number between 1 and 9. Your goal is to fill out all boxes so that every row's sum equals the number on the right, every column's sum equals number at the bottom and similarly both diagonal sums equal upper and lower corner boxes of the square. The puzzle will complete when all rows, columns and diagonals are successful. Once you complete the puzzle, you can share your success with friends and family.