{"product_id":"9780486805672","title":"100 Geometric Games","description":"There are three loops in a tangle of rope. How many are independent, and how many are interlocked?\u003cbr\u003eTwo knights stand on a chessboard. How many other knights must you add so that each square is occupied or threatened by a knight?\u003cbr\u003eAmong six seemingly identical drawings of mandalas, each rotated by multiples of 60 degrees, one is different. Which is it, and why?\u003cbr\u003eChallenge yourself with these mind-benders, brainteasers, and puzzles. Each of them has been carefully selected so that none will be too tough for anyone without a math background ― but they're not \u003ci\u003etoo\u003c\/i\u003e easy. Some are original, and all are clearly and accurately answered at the back of the book.\u003cbr\u003e","brand":"Dover Publications","offers":[{"title":"Default Title","offer_id":47126394142960,"sku":"9780486805672","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9780486805672_p0.jpg?v=1763709382","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9780486805672","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}