4 to 5teams
Many teams have won by 10 wickets in IPL,just couldn't understand your answer.
IPL teams are made to keep the matches of that teams.
Deccan Chargers and Royal Challengers Bangalore were the two teams to appear in IPL 2009 final. Deccan chargers won the match.
Till 2010 there were 8 teams in DLF IPL. Now new two teams-Kochi and Pune are added