Thunderball players pick 5 main numbers from 1-39 as well as one Thunderball from 1-14.
You can also do a Lucky Dip where you get randomly selected numbers.
You then select which draw days you want and the number of weeks you want to play.
Hopefuls can play as many as seven lines of numbers on each play slip and purchase up to 10 play slips at a time, The National Lottery website explains.
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