(1) None. (Moses didn't have an ark).
(2) Your mother, by the pigeonhole principle.
(3) I don't know.
(4) Who cares?
(5) 6 (or maybe 4, or else 3). Mr. Alfred J. Duncan of Podunk,
Montana, submitted an interesting solution to Problem 5.
(6) There is an interesting solution to this problem on page 1029 of my
book, which you can pick up for $23.95 at finer bookstores and
bathroom supply outlets (or 99 cents at the table in front of