prologue
act one
- 1. If you were going to carpet the room with a single kind of coin, which would be the cheapest option?
- 2. Write down a guess.
- 3. Write down a coin that you're sure wouldn't be the cheapest option and how you know.
act two
- 4. What information would be useful to know here?
sequel
- 5. If you could use any coin in the entire world, which would be the cheapest option?
- 6. If you could use any kind of paper currency in the entire world, which would be the cheapest option?