{"product_id":"diagnumb-advanced-vol-4-book-joel-a-fletcher-9781940116044","title":"Diagnumb Advanced Vol. 4","description":"Diagnumb puzzles for teens and adults. These puzzles use subtraction between single digit numbers and deductive reasoning (The process of elimination) between multiple-choice answers to solve, and are timed-based (optional) to rank your score to win. Puzzle solutions are correct when the difference between all numbers next to each other in all diagonal rows =2 or more without repeating a number in any diagonal row. Each book contains a practice puzzle and 30 increasingly challenging new puzzles with solutions. Game rules, definition of game terms, and how to solve are explained using illustrated examples.","brand":"WoB","offers":[{"title":"US \/ NEW \/ INGRAM","offer_id":53187557097745,"sku":"NIN9781940116044","price":9.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9781940116044.jpg?v=1772393110","url":"https:\/\/www.worldofbooks.com\/products\/diagnumb-advanced-vol-4-book-joel-a-fletcher-9781940116044","provider":"World of Books ","version":"1.0","type":"link"}