Slide 11 of 61
Notes:
Three students from Gryffindor enter the Secret Passageway from the left. At the same time three students from Slytherin enter from the right. All six students know that only one student may stand on any tile at one time. Still, none of the students are willing to turn around and allow the others to pass.
Hermione has an idea to use the Wingardium Leviosa spell that they learned in charms class with Professor Flitwick. The spell will allow one student to levitate over another student if there is an empty tile behind them,
