{"product_id":"yohaku-mike-jacobs-9781545138328","title":"Yohaku: A New Type of Number Puzzle","description":"Yohaku(TM) is a new type of number puzzle created by Mike Jacobs. It will test your number sense and problem solving skills. Each yohaku is either an additive or a multiplicative puzzle (as indicated by the symbol in the bottom right of the grid). Your task is to fill in the empty cells such that they give the sum or product shown in each row and column.Yohakus are great for use in classrooms as a lesson starter, or for the morning commute, or for something to accompany an afternoon cup of tea. Some yohakus will take a few minutes to solve, others will have you puzzling for longer.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Mike Jacobs\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 154513832X\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781545138328\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Createspace Independent Publishing Platform\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 02\/08\/2018\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 84\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.20lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 8.00h x 5.00w x 0.17d","brand":"Mike Jacobs","offers":[{"title":"Paperback","offer_id":45265396203775,"sku":"9781545138328","price":6.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_daea8c13-51a6-403a-95ec-21b46346755b.jpg?v=1713420789","url":"https:\/\/www.whiterainbookhouse.com\/products\/yohaku-mike-jacobs-9781545138328","provider":"WR Book House","version":"1.0","type":"link"}