How does System 8 work in lotto?

A System 8 means you select 8 numbers, a System 17 you select 17 numbers and so on. You can choose from 7 – 20 numbers (or 8 – 20 numbers for Oz Lotto) in one game panel. If you're playing Powerball, you can only choose extra numbers in the first panel – i.e. you cannot choose extra Powerball numbers.
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