You might be surprised to learn that 100-dollar bills are the most common currency in circulation today. The Federal Reserve estimates that there are 18.5 billion 100-dollar bills out there ...

Currently, the U.S. Federal Reserve (Fed) issues dollar bills in seven denominations: $1, $2, $5, $10, $20, $50, and $100. While the $500, $1,000, and $10,000 bills have been out of production for ...