This revised fourth edition of the Q&A book accompanies the Foundations for Scientific Investing text. It provides 455 multiple-choice, and 125 short-answer questions to accompany the long-answer questions already appearing in Foundations for Scientific Investing. The long-answer questions are repeated here also. The suggested solutions to the multiple-choice and short-answer questions appear here and are also available free of charge at the Web site for the book. If you have purchased the eBook version of this book (which uses DRM-PDF and is not able to be printed), it might be easiest to print out the Web-based solutions to consult while viewing the eBook questions. The multiple choice questions may also be useful as a test bank for instructors in any advanced investments class.