In Bulgaria’s national lottery, the same six winning numbers were drawn twice in a row. Minister Svilen Neikov ordered an investigation after the
numbers 4, 15, 23, 24, 35, and 42 were selected, in a different order,
by a machine live on television on September 6th and 10th. Some thought the results were manipulated, however after an investigation, there was no wrongdoing found.
A total of 18 people got all six numbers when they were
drawn the second time and each got $7,700. Nobody guessed right the first draw.
Mathematicians say that the chance of drawing the same six numbers in two consecutive rounds is about 1 in 4.2 million.
The following website has some calculations dealing with lottery math and whether it’s better to play 50 dollars in one lottery, or play one dollar in fifty lotteries.