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Pyramid Math Puzzle Challenge: Can you fill in the missing numbers? - Paperback
$17.53
In stock
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by Chris McMullen (Author)
Take Dr. McMullen's pyramid math puzzle challenge. Can you figure out the missing numbers in each puzzle?
Note: These are challenging puzzles for math lovers. They are not simple fill-in puzzles, and the patterns are usually not trivial lists of numbers in order, but involve mathematical operations (or combinations of them) or special sequences (like prime numbers). These math puzzles add another dimension to pattern recognition and problem solving, since patterns can run in more than one direction. The solution to every puzzle can be found at the back of the book.Pay with
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Clear Information Before You Order
Cindi Book is the trade name of Cindi Book LLC, a Texas-registered online-only retailer. We provide clear contact, shipping, return, and checkout information so customers can make informed purchasing decisions.
Business & Customer Care
Cindi Book LLC
2124 Cactus Ct, Keller, TX 76248
Administrative office only; no storefront or local pickup.
214-308-1733 · info@cindibook.com
Monday–Friday, 8:00 AM–5:00 PM CT
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Orders ship within the United States. Cindi Book branded titles typically arrive in 5–9 business days, including 0–2 business days of handling and 5–7 business days in transit. Supplier-fulfilled items typically arrive in 8–11 business days, including 1–3 business days of handling and 7–8 business days in transit. Business days are Monday–Friday, excluding U.S. federal holidays. Delivery estimates are not guarantees. Cindi Book items have a flat $9.99 shipping charge. Shopify Collective items use shipping rates set by the supplier. Orders containing items from different fulfillment sources may include more than one shipping charge. Your full shipping total is shown at checkout before payment.
Returns & Refunds
Standard U.S. returns are accepted for eligible new, unopened items within 30 days of carrier delivery. Returns are by mail. Customers are responsible for standard return shipping, there is no restocking fee, and standard exchanges are not offered. Once an approved return is received and inspected, the refund is issued to the original payment method within 5 business days. Damaged, defective, or incorrect items are handled at no return-shipping cost to the customer.
Return eligibility is subject to the full policy. Opened, read, or unsealed books with broken seals or visible wear are final sale. Digital downloads, gift cards, and personalized products are non-refundable. Original shipping charges are not refunded for standard returns. Contact us within 7 days of delivery about damaged, defective, or incorrect items.
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Some items may ship from Cindi Book or U.S.-based publishing, manufacturing, or distribution suppliers that fulfill orders for Cindi Book. Cindi Book LLC remains the customer-service contact for order questions, delivery support, returns, and refunds.