1.

A rugby tournament with 10 teams is organised.Each team will play each other exactly once.Work out the total number of games played.

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Answer:

10 teams are organised so each team PLAYS every other team at least once. So, the first team plays the other 9 teams once. You do this for all 10 teams, and you have 10 X 9, or 90 GAMES PLAYED.



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