After presenting the previous information some people might wonder how are they going to take the citizenship test if they haven't practiced. I fortunately found a set of practice questions that will be useful http://www.uscis.gov/citizenship/quiz/learners/study-test/study-materials-civics-test/naturalization-self-test-1 . The practice quiz only has 25 questions, most are easy but I found some to be really challenging. I got a 24/25 on the quiz. Try it out.