basically, all rows and all columns hav to, wen added, =21. u can only use numbers between 1 and 9, and u cant use any number twice, so u hav to use every number between 1 and 9, including 6 and 8, even though they r in the side panels alredy. only put numbers in the blank squares. please! i need it for monday! id really apreciat if u help me out! thanks in advance.