1. The document provides background information about Mark Twain, including his real name, birthday, places he lived, and various jobs he had when young.
2. It asks 13 questions to test the reader's knowledge of important facts about Mark Twain's life and work, such as the first successful story he published and places he traveled.
3. The document demonstrates Mark Twain's interest in science and technology by mentioning his fascination with inventions like the typewriter.