Each Football Margin Ticket is assigned a number between 1-100. If your Margin Tickets number matches the point difference of the selected AFL game you win $100 dollars.
For Example, take the AFL Grand Final, Melbourne VS Western Builldogs.
The final score was:
Melbourne: 140 Defeats Western Builldogs: 66
140 (Melbournes Score) - 66 (Western Builldogs Score) = A Margin of 74.
Therefore the winning Football Margin Ticket was 74.