QUESTION: Generate a question with a factual answer?

ANS: Some federal and state statutes remain on the books for how long after they are ruled unconstitutional?

QUESTION: Generate a question with a factual answer?

ANS: How much did Napoleon sell the Louisiana Territory to the United States for?

QUESTION: Generate a question with a factual answer?

ANS: Such chemicals do what to the firing of the brain's neurons?

QUESTION: Generate a question with a factual answer?

ANS:
The 75% rule states how much of a population must lie outside the range of other populations for a defining set of characters?