Can I sue for copyright infringement even if I havent registered con.

Hello sir, Iam reasoning teacher for baking subject,generally i make puzzle question for website, i have seen that some other person has just changed the name of person and cities and are publishing my content, can i sue them i have not registered my content by any seprate copyright law. question example Directions (Q. 1 to 5): Study the following information carefully and answer the questions given below. P, Q, R, S, T, V and W are seven students of a college. Each of them has a favorite subject from Physics, Chemistry, English, Biology, History, Geography and Philosophy, not necessarily in the same order. Each of them also has a favourite sport from Football, Cricket, Hockey, Volleyball, Badminton, Table Tennis and Basketball, not necessarily in the same order. R likes Philosophy and his favourite sport is Hockey.