Due April 1

There are six students in Mary's class who want to take a ride on a "bicycle built for two". How many rides must be taken so that each person rides with every other person just once?

1 comment:

  1. Bob & Jim Jim & Joe Joe & Tom Tom & Seth
    Bob & Joe Jim & Tom Joe & Seth Tom & Tim
    Bob & Tom Jim & Seth Joe & Tim
    Bob & Seth Jim & Tim
    Bob & Tim

    Seth & Tim

    15 rides

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