I made 100%, but I found a few problems: The Emancipation Proclamation didn't actually free any slaves, Abraham Lincoln did NOT free the slaves (he wasn't even alive when it happened), and the Declaration of Independence was adopted on July 2, not July 4.
Some questions that fewer people might get right:
1) How many articles of amendment were originally proposed in the Bill of Rights?
15
2) How many of these have been ratified into the Constitution?
10
3) On what date did Congress sign the Declaration of Independence?
Never. Unless you mean the Continental Congress. Which I think was established for that. And the Articles. But I don't remember.
4) On what date was the Constitution ratified?
Sometime in March
5) What document created the United States of America?
The Articles of Confederation
6) Who ORIGINALLY chose the senators?
The governors of the states
7) Who placed his signature on a proposed Constitutional amendment which said, "No amendment shall be made to the Constitution which will authorize or give to Congress the power to abolish or interfere, within any State, with the domestic institutions thereof, including that of persons held to labor or service by the laws of said State"?
I don't know, and I won't guess.
8) What document freed the slaves?
13th Amendment
9) In what year did Congress gain the Constitutional authority to levy an Income Tax?
1916 or Never.
10) What is the maximum number of years someone could serve as President?
Under the current constitution, eight.