Caro worked fast but carefully. She wrote neatly and solved smartly. As far as she was concerned, the questions were easy. Simultaneous equations had never posed a problem for her before. She had taken to the topic like a duck takes to water and had been the authority on it during her time in school.

Trisha watched with a calm but curious expression on her face as she saw Caro go steadily about her business. She really had not known anyone to be this calm, sure and quick when it came ...