Yavor Kostov appeared on the Bulgarian version of the show, called Koi iska da stane bogat, in June 28, 2005, and made it to the final question, being the youngest to do so aged only 18. However, he got it wrong, resulting in a huge loss and losing the opportunity to become Bulgaria's first top prize winner (Asen Angelov done this in June 13, 2002 but he broke the show's rules and was therefore forced to return his prize). He became the first contestant to answer the 15th question incorrectly.
However, his appearance on the show has made him well-known in Bulgaria.
25,000 lev (13 of 15) - Not Timed
John Bon Jovi who quoted him in his song "It's My Life". The correct answer was Frank Sinatra.
100,000 lev (15 of 15) - Not Timed
What date is the basis of the Latin AUC abbreviation?