Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The product of the digits within each sub-region is equal to the specified number.

Fill in the grid so that every row, every column and every 3x3 box contain the digits 1 through 9. On each angel the number in the corner is the difference or the sum of the other both numbers.

Fill in the grid so that every row, every column and every 3x3 box contain the digits 1 through 9. On each line one cell is the sum of the others.

Fill in the grid so that every row, every column and the 3x3 boxes contain the digits 1 through 9. The sum of the digits within each sub-region is equal to the specified number. No digits can be repeated in any cage. All eight blue lines must use the same three digits. Each line must use three different digits.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. The digit in a oval is either the sum or the product of the digits which are marked with its arrow. The left or top cell in an oval is the tenner, the right or bottom cell is the unit of the sum or product.

Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. In the green areas the lower row must contain the product of the digits in the upper row.

Fill the grid with the digits 1 to 9. The digits represent the height of the skyscraper in each cell. Each row, column and 3x3-box has exactly one of each digit. The clues along the edges tell you how many skyscrapers you can see from that vantage point. There are 6 boxes with a plus or minus sign where the sum or difference of the number formed by the first two rows is equal to the number formed in the third row of the same box.

Fill the grid with the digits 1 to 9. The digits represent the height of the skyscraper in each cell. Each row, column and 3x3-box has exactly one of each digit. The clues along the edges tell you how many skyscrapers you can see from that vantage point. Additional the rows form 9 correct arithmetic expressions reading from left to right.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. There are 6 boxes with a plus or minus sign where the sum or difference of the number formed by the first two rows is equal to the number formed in the third row of the same box.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. There are 6 boxes with a plus or minus sign where the sum or difference of the number formed by the first two rows is equal to the number formed in the third row of the same box.