It isn't, because you heard a mistaken version of the trick question. It's really "Why are 1998 $1 bills worth more than 1997 $1 bills".
The answer (ba-DING) is .......
1997 $1 bills are worth $1,997 while 1998 of them are worth $1,998.
Because 1976 bills are worth $1,976 and 1975 bills are worth $1,975 (If you were trying to make this look like a numismatic question by leaving out the commas, there AREN'T any U.S. $1 bills dated either 1975 or 1976!)
You've probably heard a slightly twisted version of an old joke. The answer is that 1,986 pennies are worth $19.86 but 1,967 pennies are worth 19 cents less.
In any case pennies with either of those dates are only worth 1 cent each.
Because 1,990 bills are worth $1,990 and 1,989 bills are worth $1,989
(If you were trying to make this look like a numismatic question by leaving out the commas, there AREN'T any U.S. $1 bills dated either 1989 or 1990!)
It's a trick question. The numbers are counts, not dates. Someone who has 2,004 silver dollars has one more than someone with 2,003.
This shows that the bill is a first day issue of the new bicentennial $2 bill. you took it to a post office and it was with the date "APR 13 1976". 590,720,000 notes from 1976 were printed.
There are no 1979 or 1980 Australian Dollar coins.
The first Australian One Dollar coin was issued in 1984.
If you have 1999 bills you have one more bill than if you have only 1998 bills.
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Like all modern $1 bills, a 1999 US $1 bill is worth one dollar. If your question is asking if it's worth more than one dollar to a collector, these bills have no added value unless they're in the best possible uncirculated condition.
One dollar.
It's still worth one dollar.
$20
It's worth one dollar.
Yes. The US has never withdrawn or demonetized any bills except for gold certificates. 1995 and 1999 bills are sufficiently new that some of them remain in circulation.
$20
about $11
50 cents.
20
Please check your bills again and post a new, separate question for each date. The only dates in that range are 1999, 2001, 2003, 2006, and 2009, and all of them have green seals. The last red-seal $100 bills were dated 1966.
I have a $2.00 coin Elizabeth II D.G. Reginal 1999. How much is worth? in the back of the coin it says: nunavut