Between the $1, the $5, the $10 bill, the $20 bill, the $50 bill, and the hundred dollar bill, which one has the longest average lifespan?
The $100 bill at 15 years.
Now here is a hard one. Which currency has the shortest lifespan?
If you guessed the one dollar bill, you would be wrong. It's life is 5.9 years. The answer is the ten dollar bill, at 4.2 years.