1. A man is asked what his daughters look like. He answers, "They are all blondes, but two, all brunettes, but two, and all redheads, but two." How many daughters did he have?
2. Which is more, seconds in 100 hours or inches in 100 yards?
3. Why are 1980 pennies worth more than 1979 pennies?
Will Shortz KenKen Puzzles