only one is needed but many professional teams use 3, two linesmen and one center.
in football (soccer) :- 11 men each team a referee, and 2 lines men
A football game goes for 90 min ( 1 hr 30m) but it may go over depending on the score and the referee
The referee's function is to regulate and facilitate the play of the game. His activity consists of the many things he does while regulating the game, such as starting and stopping the game, calling fouls, managing restarts, etc.
11 players on each team plus a referee - so 23
there are two refferies in a Basketball game
In common soccer each side has 11 players. 'Five a side soccer' used to be popular when i was young, but don't know if it's still played.
It usually depends on the soccer league you are reffing for, but most of the time you have to be in high school. The age limit is 10. this is to referee a u-8 game. Also you must pass the certification exam. Well, in my town you can be 10 to referee a soccer game. I am 10 and I can referee in Wisconsin.
It depends on what level of play and what regulations you are playing but the USAV regulations require that you have a first referee (up ref), a second referee (down ref), 2 line judges , a scorekeeper, libero tracker, book referee. which is a total of 7 referees. The first referee and the book referee have jursidiction over their reponsibilities.
Only Eleven players are allowed to be on the pitch at one time of the game.
There are four referees for each game, the main referee the two linesmen and the fourth referee who shows the time and change in number of the player.
A typical soccer game uses one ball.
Usually there are four officials, a referee, two linesmen and a fourth referee to show the time or change in player, or if the referee can not take further part.