1. What does Claire think of Hal when Catherine first tries to explain the events of the previous night?
(a) She thinks Catherine may be in a fight with him.
(b) She thinks Catherine may have imagined him.
(c) She thinks Hal sounds lovely, and hopes Catherine will want to have a double wedding.
(d) She thinks Hal is a delinquent.

2. Why is Hal able to put the notebooks in order?
(a) Because Catherine has helped him organize.
(b) Because Robert dated every entry.
(c) Because he has carbon-dated the pages in a lab.
(d) Because the notebooks are color-coded.

3. Who is Sophie Germain?
(a) A woman who teaches at the University of Chicago and was very close to Robert.
(b) A woman who published great mathematical works under a pseudonym during the French Revolution.
(c) A woman Catherine previously thought was her mother.
(d) A woman whose husband stole her ideas and published her work under his name.

4. How did Hal and Catherine meet four years ago?
(a) At a party on campus.
(b) At a supermarket in the frozen foods aisle.
(c) Catherine was in one of his classes.
(d) He was dropping off his thesis for Robert's perusal.

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