According to a 2018 survey, 64 percent of American citizens would fail the test immigrants take to become citizens.
Immigrants taking the exam as part of their citizenship application tend to fare much better. The combined pass rate for the civics exam and an English evaluation performed in the same interview is 91 percent, U.S.C.I.S. reported in December.
Of course, immigrants generally study for the test before taking it, while the survey respondents may not have cracked a history or civics book in decades.
To take a survey of the 10 hardest questions on the citizenship test click here.