PowerBall XTRA: balanced odd/even mix

The most common split in the last 100 draws was 1 odd-low, 2 odd-high, 1 even-low, 1 even-high (low = 1–25). It appeared in 13% of draws, against 6.3% expected by chance. Each group was filled with its most frequent numbers.

1. Sort each of the last 100 draws into odd-low, odd-high, even-low and even-high counts.
2. Find the most common mix.
3. Fill each group with its most frequent numbers.

Limits: Common mixes are common because there are more combinations of them, not because they are more likely to win.

Replayed over the last 100 draws, this strategy averaged 0.55 hits a draw. Random numbers average 0.50.