Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. The colored squares must contain each the digits 1 through 9.

Fill in the grid so that every row/column contains all the numbers from 1 to the length of that particular row/column. The sum of the digits within each sub-region is equal to the specified number. No digits can be repeated in any cage.

Fill in the grid so that every row, every column, and every 5x2 box contains the digits 1 through 4. Each row, column, and 5x2 box contains one 1, two 2's, three 3's and four 4's. Orthogonally adjazent cells must have different digits.

Fill in the grid so that every row, every column, and every 5x2 box contains the digits 1 through 4. Each row, column, and 5x2 box contains one 1, two 2's, three 3's and four 4's. Orthogonally adjazent cells must have different digits.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 3. Each row, column, and 3x3 box contains each digit three times.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 3. Each row, column, and 3x3 box contains each digit three times.

Fill in the cube so that every outlined region and every layer (as shown by the double arrows) contains the numbers 1 through 12.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. Equal digits can be neither orthogonally nor diagonally adjazent.

Fill in the grid the digits 1 through 7 so that no row, column, and diagonal contains any digits more then once. Different colors help to spot the diagonals.

Fill in the grid so that every of the nine marked 3x3 box contains the digits 1 through 9. No digit can repeat in a row or column.