2. Why is Claire confused about Catherine's relationship to Hal?
(a) Because Hal and Robert are friends, but not Hal and Catherine.
(b) Because Hal and Catherine were engaged to be married.
(c) Because she does not know if they were partying together, if he was an intruder, or if he only exists in Catherine's mind.
(d) Because prior to this incident, she knows Catherine and Hal were the best of friends.

3. What does Claire want Catherine to do?
(a) Go back to bed and rest.
(b) Go back to school in Chicago.
(c) Stay in the house where she and Robert lived.
(d) Move to New York, where Claire can keep an eye on her.

4. What was Hal's state of mind when he met Catherine four years ago?
(a) Happy; he'd specifically set up the meeting to talk to her.
(b) Confused; he did not have any idea who she was.
(c) Nervous; he was dropping off his thesis for her father to check.
(d) Angry; he's hoped to meet Robert alone.

5. Where does Catherine tell Claire to look for proof that Hal is real?
(a) In the closet.
(b) In the upstaris bedroom.
(c) In the sky.
(d) In the paper.

6. Who paid the mortgage on the house during Robert's illness?
(a) Catherine.
(b) Hal.
(c) Robert.
(d) Claire.

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

8. What does Robert get Catherine for her birthday?
(a) Chocolate.
(b) A puppy.
(c) Wine.
(d) Champagne.

9. Who was Claire drinking with the night before?
(a) Hal.
(b) Catherine.
(c) Robert.
(d) The theoretical physicists.

10. Who interrupts Catherine and Robert's conversation?
(a) Hal.
(b) A stray dog.
(c) A passerby.
(d) Claire.

11. What mathematical principle is associated with Sophie Germain?
(a) Germain Quarters.
(b) Germain Algebra.
(c) Germain Primes.
(d) Germain Angles.

12. Why is Claire concerned after speaking with the policemen?
(a) The policemen have a new break in the case over Robert's death.
(b) They forced their way into Catherine's house, breaking things and trying to intimidate Catherine.
(c) They claimed Catherine was rude and abusive when they responded to her 911 call the evening before.
(d) The policemen have Catherine in custody, and she must pay the bail.

13. What were the police told when they responded to Catherine's 9-1-1 call?
(a) There was shoot out.
(b) There was a robbery.
(c) There was a murder.
(d) There was a fire.

14. What does Claire fear about Catherine?
(a) She fears that Catherine will move to New York City.
(b) She fears Catherine's brute strength, because they have fought many times before.
(c) She fears that Catherine is talented, but tends toward instability like Robert.
(d) She fears that Catherine will run away.

15. Why does Claire want Catherine to come to New York?
(a) She never wants to come back to Chicago to visit.
(b) She wants to get a two bedroom apartment so they can live together again.
(c) She needs Catherine to help organize the upcoming wedding.
(d) She is worried that Catherine is upset and exhausted, and living in Chicago is bad for her mental health.