The correct answer to the question “How many sheets are there in Excel Workbook by default” is option (b). 3. As stated officially by Microsoft, that Excel contains 3 sheets by default, and could add as much as the available memory supports. Wish to learn Excel and become proficient? Check out Intellipaat’s Advanced Excel courses to help you achieve what you are aiming for. And If you are a novice in Microsoft Excel, I would suggest you watch a video on Excel Basics for Beginners to help you get started.