Final answer:
The correct option is 4) Guessing randomly.
Guessing randomly is the least effective method to predict test questions compared to reviewing past tests, studying textbooks, and asking the teacher for hints.
Step-by-step explanation:
Among the methods listed for predicting test questions in preparation for an upcoming test, the least effective method is guessing randomly. Reviewing past test questions can reveal the format and types of questions the teacher may use, and studying the textbook will cover the essential content likely to be included in the test. Asking the teacher for hints can also yield insights into what areas to focus on.
However, guessing randomly has no strategic basis and is unlikely to result in accurate predictions of test questions. Effective studying often involves organizing information into categories and using flashcards to review key terms and concepts, which reinforces understanding and retention. Other helpful strategies include using web-based quizzes and study guides for additional practice.