It depends A LOT on their dates. $2 bills have been issued since 1862 so there's not enough space here to go into all of the little details. Also, all $2 bills from 1928 to 1963 have red seals. Blue seal 2's were only printed for a few years and most recently 1917.
In general:
Anything older than that needs to be examined in person.
It is worth two dollars.
30 dollars.
16 dollars
A two dollar bill generally is worth very close to two dollars if it has a green seal, however, blue and red seals are worth about five dollars. If it is from 1976, it is also worth about five dollars.
They are only worth 2 dollars. They are uncommon though.
It is worth two dollars.
Two dollars
30 dollars.
A 100 dollar bill is worth 100 one dollar bills.
16 dollars
They're still worth one dollar each.
1,000,000 dollars!
1 million dollars
2 dollars each
A two dollar bill generally is worth very close to two dollars if it has a green seal, however, blue and red seals are worth about five dollars. If it is from 1976, it is also worth about five dollars.
It depends on the specific denominations of the bills. For example, it could be six one-dollar bills, or two five-dollar bills and four one-dollar bills.
Obviously worth two dollars.