They are usually used to count as a song – but numbers 5, 6, 7 and 8 have become the focus of a multi-million dollar investigation in South Africa.
The country’s PowerBall match on Tuesday has sparked accusations of fraud after 20 people won a share of the jackpot.
The winning numbers were 5, 6, 7, 8 and 9 while the Powerball was 10.
Each person took home a 5.7m rand share of the jackpot (about A $ 504,000).
Although it may seem incomprehensible, the odds of the winning sequential numbers being drawn are the same as any other combination.
“Congratulations to the 20 winners of the PowerBall raffle tonight,” lottery operator Ithuba tweeted.
“These numbers may be unexpected, but we see many players choosing to play these sequences.”
In the South African Powerball draw there is a one in 42,375,200 chance of choosing the lucky numbers.
The South African National Lotteries Commission (NLC), the nation’s regulatory body for competitions, said BBC News he would investigate the equal game.