Question

a rugby tournament with 10 teams is organised. Each team plays each other exactly once. work out the total number of games

Answer 1

90 games

Explanation:

because 1 team plays 9 game so all team plays 90 games

Answer 2

45

Explanation:

9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 45