Four smart gnomes are standing in line with all faces pointed in the same direction. They all carry a hat, but they do not know their color. They only know that there are two red and two green hats. The first gnome stands behind a wall and does not see the others. The second gnome is able to see the hats of the third and the fourth. The third only sees the hat of the fourth, and the fourth gnome does not see any hat at all. The gnomes would like to know which hat they wear without checking their own. When a gnome has figured out which hat he carries, he will immediately tell the others. Suppose that the first gnome wears a red hat, the second a green one, the third a red one and the fourth a green one. Which gnome will be the first to figure out?

What question do you ask all day, but the answer is always different.

Imagine you are a pilot of a plane. You are going to fly a plane from Northern Maine to Los Angelos, California, which is 3000 miles. It takes 10 hours. You drive to a hotel in LA which is 18 miles from the airport. The next day, you wake up and drive back to the airport which is another 18 miles. You fly another plane up to Vancouver, Canada which is 700 miles. When you arrive in Canada, you go into the employees lounge and you sleep at the airport that night. The next day, you fly a long trip to Sydney, Australia which is 10,000 miles. You stay in Sydney for 3 days, and then you fly all the way back to Northern Maine, where your home is. The flight is 12,000 miles. How may miles did you go in total and how old is the pilot?