I've never bothered, as I know it is obviously possible to win but despite the fact that I don't tend to gamble on anything the odds with the lotto are rather mad;

1 ball = 8/1
2 balls = 78/1
3 balls = 921/1
4 balls = 14,125/1
5 balls = 317,814/1
6 balls = 13,983,816/1

(yes I got bored and worked them out)