Oz Lotto , initially began life as a direct 6/45 lotto game. Players expected to choose 6 balls from a conceivable 45. Likewise with most long-running lotteries, the game created after some time and in October 2005 a seventh ball was included. With the expansion of the seventh ball the Oz Lotto was likewise renamed in certain Australian regions to Super 7's Oz Lotto and Oz 7 Lotto. Oz Lotto is one of only a handful couple of lotteries on the planet wherein 7 numbers are drawn from a similar ball set.
To play the Oz Lotto players need to select 7 balls from a possible 45. To win the jackpot prize players need to match all 7 numbers drawn. In addition to the 7 balls drawn a further 2 balls are also drawn, known as the ‘supplementary numbers’. These 2 extra numbers create additional prize tiers (divisions 2, 4 and 7)