50/50 was a children's game show that was on BBC1 in the late 1990's. It consisted of two schools from the UK putting forward 50 students. Each child was given a number from 1 to 50 which they wore during the show, before each round a random number generator picked what students would take part in the next game.
One of the schools wore blue t-shirts and the other wore yellow. They sat opposite each other in raised seating while the game took place in between them.
The games usually consisted of inflatable obstacle courses.