This one may be to easy, and most have probably seen it before, but I have had some fun with it over the years. Three mycologist go to rent a motel room for the night. The clerk charges them $30 for the room . The three mycologist decide to split it evenly three ways and each pay $10, and then go up to their room. The manager comes in and the clerk tells him he just rented a room to three people for $30. The manager tells him the room is only $25, and to please take their $5 change up to them. On the way there the man is thinking, "How am I going to split $5 between 3 people evenly? I know! I'll give them each $1 back and keep $2 for myself." So he gives each of the men $1 back, and pockets $2 So in the end The three of them paid $10 each They each got $1 back witch means they paid $9 each times 3 = $27 The clerk kept $2 add that to the $27 witch = $29 Where did the missing $ go?