Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9.

Fill in the grid so that every row, every column, and 5x2 box contains the digits 0 through 9.

Fill in the grid so that every row, every column, and 5x2 box contains the digits 0 through 9.

Fill in the grid so that every row, every column, and 4x3 box contains the numbers 1 through 12.

Fill in the grid so that every row, every column, and 5x3 box contains the letters A through O.

Fill in the grid so that every ring and every pair of neighboured circle segments contains the digits 1 through 8.

Fill in the grid so that every ring and cells of the same color contains the digits 1 through 8.

Fill in both grids so that every row, every column, and every 3x3 box contains the digits 1 through 9.

Fill in the grid so that every of the lines in the three marked directions and every circle contains the digits 1 through 6.