1. You can take away the whole and still have some left. You can take away some and still have the whole left. What is it?
Ans. The word "wholesome."

2. If a man can walk 2 miles per hour, and needs nine hours of sleep each day, what is the fastest he could travel the 3000 miles from New York to Los Angeles?
Ans. Just about three hours in a plane. (Okay, or 100 days walking, but the riddle didn't specify that he was walking - just that he can walk two miles per hour.)

3. The thunder comes before the lightning; the lightning comes before the clouds. The rain dries everything it touches.
Ans.A volcano.

4. On a beautiful sunny day in Florida, a man freezes to death outside. How is this possible?
Ans.He climbed into the landing gear of a plane to get a free ride, and the temperature at 30,000 feet was 40 degrees below freezing.