891. Find the word that fits the first definition, then add a "C" in
front of it to make a new word that matches the second definition.
Place a "C" in front of a type of jump and get a cut of meat.
Place a "C" in front of what usually covers a head and get a piece of furniture.
893. Susan is now four-fifths of her sister Jane's age. Three years ago, she was one-half her sister's age. Five years from now, Susan will be nine-tenths of Jane's age. If they are both under the age of ten, how old are they now?
895. A man had a clock with an hour hand and a minute hand of the same length and indistinguishable. If the clock was set going at noon, what would be the first time that it would be impossible, by reason of the similarity of the hands, to be sure of the correct time? In grappling with this little problem, you may assume that it is possible to indicate fractions of a second. On this assumption, an exact answer can be given.
897. The staff of a bank includes a director, an assistant director, and four
department heads. The director wants to have several locks on the strong room door and several keys, so that:
· He can open the door alone.
· The assistant director can open it only if he is accompanied by any one of the department heads.
· Any three department heads can open it.
How many locks are needed, and how should the keys be distributed?
900. The equation 216 + 378 = 594 uses all the digits from 1 to 9 only once each. There are several combinations of those numbers (not inversions of top and bottom) that will deliver the same answer. Can you find 3 more?