A brain teaser for ya:
Three travellers go to a hotel and are charged $30 for a room. They each contribute $10 for it. Later the clerk realizes that he made a mistake and should have only charged them $25. He gives the bellboy $5 to return to them, but the dishonest bellboy gives them only $3, keeping $2 for himself.Now each traveller has paid $9, for a total of $27. The bellboy has $2. That makes $29 accounted for.Where has the 30th dollar gone?