1.21. A woman is heating her coffee in a small microwave oven. She puts it in for exactly two minutes. She then opens the door, closes it, then heats her coffee for two more seconds. (JC original?)

1.21 answer: She opens the door and sees that the handle of her cup is facing the back of the microwave. She then sets the oven for two more seconds so that the turntable will turn 180 degrees so that she can reach the cup-handle, to avoid burning her hand.