In this Cyberchase video, Bianca and her friend go camping and soon realize that Bianca has left the food at home. They find a vending machine in the woods, but it doesn't dispense the food that corresponds with the numbers Bianca presses. After several attempts to get her favorite candy bar, Bianca discovers a pattern, or rule. Each time she enters a number, she gets a snack labeled with the number she pressed plus two (n + 2). In the accompanying classroom activity, students play a dice game in pairs in which one student applies a rule in secret that the other student must guess. Points are awarded for correct guesses, and students are penalized for incorrect guesses.