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 3x2 box contains the digits 1 through 3. Each row, column, and 3x2 box contains one 1, two 2's, and three 3's.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1, 2 and 6. Each row, column, and 3x3 box contains one 1, two 2's and six 6's.

Fill in the grid so that every row/column contains all the numbers from 1 to the length of that particular row/column.

Fill in the grid so that every row/column contains all the numbers from 1 to the length of that particular row/column.

Fill in the grid so that the grid contains the digits 1 through 9. Digits in the outside equal the sum of the three numbers of the corresponding row or column.

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 grid so that every row, every column, and every 3x3 box contains the digits 2 through 4. Each row, column, and 3x3 box contains two 2's, three 3's and four 4's.

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