"The Great Courses Secrets of Mental Math" is a DVD set featuring 12 30-minute lectures by Professor Arthur T. Benjamin. The program covers topics in Mathematics and Applied Mathematics, providing viewers with a deeper understanding of mental math techniques. The accompanying guidebook provides additional resources and insights to help learners master the concepts presented in the lectures. This DVD set, published in 2011, offers a comprehensive and engaging way to explore the secrets of mental math. ?????????? New Sealed All items Guaranteed to be in said or better condition- Ships same day before 1pm EST weekdays! Note: The Photos are the actual item Terms Of Sale Payments: Payments on "Buy Now" items are due within 48 hours Pay Sooner get it sooner! Payment must be made within 3 days of auction end or item will be re listed non-paying buyer dispute will be filed. We offer "Make Offer" option on most items. Only serious offers will be considered Returns All returns subject to a 20% re-stocking fee at the seller's discretion. If item is new and boxed must returned not opened If an opened box item must be returned with original packaging Please contact me to set up returns. If stated, Buyer pays all return shipping fees Shipping Information Shipping Ships next weekday from non smoking home All items are guaranteed to be in said or better condition We are not responsible for incorrect or undeliverable addresses. We ship 100% of all orders the same or next business day after payment received/cleared. Please understand that once orders are shipped, we cannot control the transit times thereafter Customer service is very important to us. Any questions? Contact me. Please contact me before leaving feedback in order to resolve any issue. Thank you for looking!