Here are the answers!
Why do you think some bills last longer than others? Click here to see the answer.
Some bills are used more often than others so the increased handling wears them out faster.
Why do $1 bills have a longer life span than $5s, $10s, and $20s? Click here to see the answer.
Each $1 bill gets handled less often because there are so many of them. The $1 bill makes up about 45% of currency production.