U.S. Citizenship Quiz I Source: Immigration and Naturalization ServiceCould you pass the U.S. Naturalization Test? Question 1 (out of 10): How many states are there in the Union? 52 50 40 More Quizzes from Factmonster: Try another US Quiz ! Quiz Archive FEN Learning is part of Sandbox Networks, a digital learning company that operates education services and products for the 21st century.