1. Why did Robert keep requesting that Catherine check out library books for him?
(a) He thought that aliens were sending him messages through the Dewey decimal system and was working out the code.
(b) He was building a large model out of library books in his office.
(c) He had a vendetta against the library and wanted to take as many books as possible.
(d) He had a goal to read every single book in the library.

2. What time of day does Catherine's conversation with Robert occur?
(a) Between 9:00PM and 10:00PM.
(b) Between 7:00AM and 8:00AM.
(c) Between 12:00AM and 1:00AM.
(d) Between 2:00PM and 3:00PM.

3. What is Imaginary Number, or i?
(a) A theory of Hal's on which he is writing a paper.
(b) Catherine's favorite cereal.
(c) A song of Hal's band's that consists of three minutes of silence.
(d) A theory of Robert's before his death.

4. What is Hal carrying when he enters?
(a) A bouquet of flowers and a card.
(b) A briefcase and a parka.
(c) A backpack and a folded jacket.
(d) A laptop computer.

5. What fields did Robert, in his younger days, make significant contributions to, according to Hal?
(a) Contemporary american fiction, contemporary satire, and poetry.
(b) Biochemistry, zoology, and entomology.
(c) Game theory, algebraic geometry, and nonlinear operator theory.
(d) Weapons research, triangulation theory, and international politics.