Here is a list of the signs from 21 the team uses to cheat. It is not totally complete, but these are all the ones I could get from the movie 1 – Tree 3 – Stool – Three legs on a stool 4 – Car 5 – Glove – Five fingers in a glove. 6 – Gun – A six shooter. 7 – Craps 8 – Pool – Eight Ball. 9 – Cat – Cats have nine lives. 12 – Eggs – Twelve Eggs in a carton. 13 – Witch - 14 – Ring – 14 carat diamond ring. 15 – Paycheck – The 15th of the month is a payday for many people. 16 – Sweet – Sweet 16th birthday. 17 – Magazine – The magazine Seventeen.