{"product_id":"9780486169453","title":"The Green Book of Mathematical Problems","description":"Rich selection of 100 practice problems — with hints and solutions — for students preparing for the William Lowell Putnam and other undergraduate-level mathematical competitions. Features real numbers, differential equations, integrals, polynomials, sets, other topics. Hours of stimulating challenge for math buffs at varying degrees of proficiency. References.\u003cbr\u003e","brand":"Dover Publications","offers":[{"title":"Default Title","offer_id":47105149370608,"sku":"9780486169453","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9780486169453_p0.jpg?v=1763708308","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9780486169453","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}