Carsh, is right if you look at it from his mathematical point of view.

There was a current affairs segment on how to consistantly win those free prizes you enter from various newspapers and magazines. Those cut-outs.

All promotional stuff, but it showed if the numbers are played right, you actualy can win these free prizes.

How ?
Let's say there was a free competition to win a washing machine.
Then there is another free competition to win a the latest wiz-bang PC
And lets say there are 10 more of these various free competitions.
Each of these promotional competitions require you to fill out the usual name,address, age,favorite color, star sighn etc etc etc. cut it out and snail-mail it by dead-line close date.

The trick with the niumbers side of things is , NOT to enter the same competition as many times as possible, but to enter as many competitions as possible, ONCE.
So if there are 10 competitions, all free to enter chances are you will be in front by winning a prize from one of the draws.
But you won't win if you enter the same draw 100 times.

Same principle, ain't it ?