A man earned 4 million airline miles for free without breaking any laws by using his credit card to purchase free-delivery $1 coins from the U.S. mint.
11
A Native American tribe in South Dakota collects bottle caps left by campers, using them as currency. Several banks in the area now recognize the caps as legal tender.
225
The hands of the clock on the back of the $100 bill are set at approximately 4:10.
72