member who is not sitting has no number. if there is no one sitting in the armchair, everyone sitting down becomes #12 1/2 until someone sits in the armchair. number changes become effective at the beginning of each step.
4. get the duck to sit under chair #5. if it is reluctant, give it food. be friendly and it will eventually play along. ducks love mystery hunts.
6. have members #3 and #6 switch places, taking their chairs with them.
7. paint each paint can with a mixture of the paint from the other two cans. mix the paint from the purple can and the green can in the smallest watering can, mix 