Originally, as in the UK edition, contestants were required to correctly answer fifteen questions of increasing difficulty; however, in 2010, the format was modified so that the contestants were faced with ten questions of random difficulty and prize value followed by and a second level of four questions of increasing difficulty referred to as "Classic" Millionaire. Nevertheless, in 2015, the program returned to a more classic version of gameplay, in which contestants will be required to correctly answer fourteen questions of increasing difficulty and fixed value in order to win the million dollar prize.