A Diamond was stolen at Cornet Hotel during the night and all the guests would stay another night, making a perfect crime scene investigation. There were 5 suspects. A magician came during the day saying he could solve this case.
He said "These are magic sticks, the thief's stick will grow 2cm overnight, so you all keep them under your pillow. In the morning i will know how the thief is by who has the longest stick."In the morning the magician examined all the suspects sticks. There were four long sticks and one short one. A guest said "Well it canīt be all four of us, all our sticks grew!" the magician looked again and said, it is the girl with the short stick. But how?