Question

В шахматном турнире принимали участие 10 человек.Каждый участник сыграл со всеми остальными шахматистами по одной партии.Сколько было сыграно партии?

Answer 1

1*(10+9+8+7+6+5+4+3+2+1)=55 партий

Answer 2

Calculating the Number of Games in a Chess Tournament

To calculate the number of games played in a chess tournament where 10 participants played against each other once, we can use the formula: Number of games = (n * (n - 1)) / 2, where n is the number of participants.

Using this formula: Number of games = (10 * (10 - 1)) / 2 Number of games = (10 * 9) / 2 Number of games = 90 / 2 Number of games = 45

So, in the chess tournament with 10 participants, a total of 45 games were played.