National Lottery Oddsl

In the Lotería Nacional, in addition to the numbers in play, it is necessary to take into account the series. In the weekly draw on Thursdays, 6 series of 100,000 numbers (00,000-99,999) are issued, of which 35,450 win some kind of prize -several "major" prizes, approximations, "minor" prizes and reinstegros- while on Saturdays and special draws such as the Red Cross or the July draw, there are 10 series, with the same number of prizes as on Thursdays.

In a Thursday drawing, the probability of winning a first prize of 100,000 € is 1 in 100,000 (number of different tickets) but there is also a prize of 200,000 € for that number of a certain series, so the probability decreases to 1 in 600,000 (6 series of 100,000 numbers).