"Double, double, toil and trouble!" You probably knew this line long before you read The Tragedy of Macbeth. In fact, most of our popular lore about witches, from cauldrons, to warts, to pointy hats, comes to us courtesy of the bard. However, the witches here are not just for a Halloween-like effect. Instead, they both propel and predict the behavior of the players and the tragedy that is to come. Be sure you understand the important role of the Witches in Macbeth by taking our exclusive, interactive quiz. Rank your score against others and see how you compare. What have you got to lose? Nothing! What do you have to gain? A better grade!