Introduction:When presented with two potions and two cauldrons, which ones do you take/do first to escape the room unharmed?This math puzzle can take up an entire class, be given as a puzzle for the week, or as an extra credit assignment. If you do it as a class activity, one recommendation is to split the class into teams so they can solve the riddle together. Covered Topics: Logic, basic chemistry, simple algebraic conversions, rates, and inequalities.