# Global Change Seminar "It's Your Move!" Individual Exercise

## Doubling

This exercise has four parts. If you have kids or grand kids, you may find it fun to do this exercise with them.

1. Take a piece of 8½" by 11" paper and fold it in half. Then fold it in half again. Keeping folding in half until you can't fold the paper any more. Count how many times you folded the piece of paper and make a note of that number.
2. Next do the same thing with a centerfold page out of a newspaper. Make a note of how many folds you got this time and also the dimensions of the newspaper sheet.
3. Now, start with the number "2" and double it. Keep on doubling the answer in your head, keeping track of how many times you do the doubling, until you can no longer do it in your head. At that point, write the number down on paper and continue doubling until you get to the 50th double. It's OK to use a calculator if you want. Write down the answer.
4. Next, assume you could find a piece of paper big enough to fold it in half 50 times. Also, assume that the paper stacks to a thickness of 200 sheets to the inch. How high would your folded stack be? Write down the height of the stack.