If you would fold a letter in two fifty times, how thick should the enveloppe be that can fit the letter? Assume that the thickness of a piece of paper is about 0.05 mm.

Suppose you have two bottles with equal perimeter, thickness and height. One bottle is cilindrically shaped, the other one has the shape of a rectangular box with a square shaped bottom. In which of the bottles fits more milk?

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?