Description: By Royal V. Heath. More than 60 new puzzles and stunts based on the properties of numbers. Easy techniques for multiplying large numbers mentally, identifying unknown numbers, determining the date of any day in any year, interest rates worked in one's head, such entertainments as the Lost Digit, and Psychic Bridge. Over 30 pages of magic squares, triangles, cubes, much more. Inexhaustible source of stimulating mathematical recreation. 76 illustrations, 128 pages, 5 3/8" x 8 1/2". We offer Combined Shipping discounted rates when you purchase multiple items (same or different products) from us at the same time! Add all your items with the "Add to Cart" button. When you are finished shopping, select "Request New Total From Seller". Then, once we can see your order, we will send you an invoice with your combined shipping cost. You MUST request a new total to receive a combined shipping invoice. Thank you.
Price: 12.5 USD
Location: San Francisco, California
End Time: 2025-01-20T07:08:03.000Z
Shipping Cost: 0 USD
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Item Specifics
Restocking Fee: No
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Return shipping will be paid by: Buyer
Country/Region of Manufacture: United States
