1. What does Robert ask Catherine to do?
(a) He asks her to stay out of his research.
(b) He asks her to move back home.
(c) He asks her to leave him alone.
(d) He asks her to work with him.

2. Why is Catherine adamant that Robert could not have written the proof?
(a) Because the proof is incorrect and full of errors, and Robert never made errors.
(b) Because, though he asked her to keep his secret, she knows that Hal wrote the proof.
(c) Because she knows that Claire wrote the proof and is keeping it a secret.
(d) Because, even during the good year when he was lucid, he was not able to do mathematics.

3. Why did Claire stay up so late?
(a) She got caught with the physicists, and all her friends went home.
(b) She was arguing with Catherine.
(c) She was working on a very important paper.
(d) She could not sleep.

4. Why is Hal hesitant after Catherine asks him about sex at the Conference?
(a) He dislikes her and is thinking of a way to leave.
(b) He is not sure if she likes him, and plans to give her a lie detector test to find out.
(c) He is not sure that she is flirting with him, and does not want to make a bad impression.
(d) He dislikes her and does not want to talk about sex.

5. What was Robert's occupation?
(a) A mathematician and teacher at the University of Chicago.
(b) A physicist at New York University.
(c) A plumber and handyman in Chicago.
(d) A salesman in Boston.