Q: 9 (IAS/2010)

In a tournament 14 teams play league matches. If each team plays against every other team once only then how many matches are played ?
question_subject: 
Logic/Reasoning
question_year: 
2010
question_exam: 
IAS
question_sub_subject: 
Reasoning
question_topic: 
Analytical
stats: 
0,288,264,144,288,80,40