What are books used by students for solving problems and answering questions called?

Workbooks are specifically designed for students to engage with the material actively by solving problems and answering questions. They often include exercises, practice problems, and space for students to write down their responses, making them an effective tool for reinforcing learning and practicing skills in a hands-on way.

Textbooks typically contain comprehensive information on a subject and are more focused on delivering content than providing interactive exercises. Study guides serve to summarize key points and prepare students for exams rather than providing a structured space for problem-solving. Reference books, like dictionaries or encyclopedias, are intended for looking up specific information rather than for solving problems or answering questions interactively.

Thus, the distinctive focus of workbooks on active participation through exercises makes them the correct choice in this context.