posted by laly .
justin, julie, jamie, matt, ryan, and roland are the six players in a round-robin tennis tournament. each player will play a set against each of the other players. list all the sets that need to be played.
I would list the names vertically.
Now pair up one at a time. For example
Then go to the next one; i.e., Julie.
Omit Julie/Justin because you already have that one.