Hi , My name is Carolyn and I am in 9th grade I have a couple of questions that my dad asked me and I do not think it can be done in the manner he wants it to come out to. He is going on a golf trip in June. There are going to be either 8 or 12 players playing 4 rounds of golf. The questions that he says will not work and I do not know how to figure it out either is 4 Rounds of golf is for sure. 18 hole Rounds each 4 Players to a group Either 8 or 12 players can every player play with every player in a group at least once during those 4 rounds. If this can be done can you give me the combinations for both 8 and 12 , so I can help out my dad. Along with how you you figure this out. Thank you, Carolyn Carolyn For 8 players: Round 1 1 2 3 4 5 6 7 8 Round 2 1 2 5 6 3 4 7 8 Round 3 1 2 7 8 3 4 5 6 Round 4 Any arrangement - in the first three rounds, every player has played with every other player at least once Note - it would be impossible for every player to play with every other player EXACTLY once For 12 players (a number or letter represents a player): Although I can't prove it, this seems to be impossible Paul