Question 10
A square-shaped floor is covered with congruent square tiles. If the total number of tiles that lie on the two diagonals is 37, how many tiles cover the floor?
Grid convention: the tiles form aligned rows and columns; count tiles whose interiors a diagonal crosses, not tiles touched only at a corner. A tile on both diagonals is counted once.
Grid convention: the tiles form aligned rows and columns; count tiles whose interiors a diagonal crosses, not tiles touched only at a corner. A tile on both diagonals is counted once.