You must figure out what combination of numbers to use so that each column or row adds up to the totals shown in the white numbers. The white arrows show you in which direction you will be adding, and we have left you some numbers as hints. Better sharpen your pencil!
Here are a few simple rules:
— You are only adding the numbers in any set of white boxes that are touching each other.
— Use only the numbers 1 through 9. Each number can only be used once in each set.
Remember, you need to think ahead a little bit. Each number has to be correct both across and down!