{"product_id":"9781787394292","title":"Mensa's Most Difficult Maths Tests : Prove your arithmetic prowess by solving the toughest numerical puzzles by Mensa Ltd","description":"Mensa's Most Difficult Maths Tests provides an exceptional challenge for even the most adept of puzzlers. This full-colour book features a huge variety of numerical brainteasers that will test even the most mathematical of minds. With puzzles ranging from the familiar - such as kakuro and killer sudoku - to the exotic - such as sum skyscraper and calcudoku - this fiendish puzzle book will keep you entertained for hours. Are you up to the challenge?\u003cbr\u003eBinding: Paperback \/ softback","brand":"Gardners","offers":[{"title":"Default Title","offer_id":56305139319157,"sku":"9781787394292","price":9.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/7193\/3106\/files\/9781787394292.jpg?v=1762796890","url":"https:\/\/backstory.london\/products\/9781787394292","provider":"Backstory","version":"1.0","type":"link"}