Sudoku

In our maths  class we have been given a  task to do Sudoku . What we have to do is in each box we had to do one to nine . But the hard challenge is we are not allowed to do the same number in each column and box . I had a hard time trying to figure this all out but I ended up finishing it .  At first I was confused I started all over again three times but once I got I had joy in me . I had a great time trying to get this done .