tracy
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You are correct but there could be a huge loss at the end if your breakeven goes past 10 doubles needed to breakeven because a State may not meet your breakeven number.
You can play only the doubles. BUT it will significantly bring up your breakeven double win number to 8doubles(40 numbers) and 10doubles(50 numbers), etc. More doubles played the higher the breakeven. While playing all the numbers and winning every draw will have you at 3-5 double wins to breakeven before making profit.
40doubles x $0.25=$10cost x 60draws = $600cost (8 double wins to breakeven)
18doubles x $75prize = $1,350prize
$750profit
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50doubles x $0.25=$12.50cost x 60draws = $750cost (10 double wins to breakeven)
18doubles x $75prize = $1,350prize
$600profit
THEREFORE, playing ALL the numbers (162, etc) brings down your breakeven to 3-5 doubles and loss per draw between $3-$5.50. PLUS, I would consider the psychological affect when losing 42 times instead of winning all your draws. It can cause a person to lose motivation, get depressed and give up
BUT I would suggest to take some time to back test playing doubles with Auto-Predict to see if the amount of doubles will stay between 40-50 numbers. If it gets past 10 doubles needed to breakeven, you could lose money if the State does not win enough doubles to satisfy your breakeven number.