{"product_id":"brainflexing-balance-problems-other-puzzles-mastermind-collection-9781402727337","title":"Brain-Flexing Balance Problems \u0026 Other Puzzles (Mastermind Collection)","description":"\u003cdiv class=\"book-description\"\u003e\n\u003cp\u003e\u003cstrong\u003eBrain-Flexing Balance Problems \u0026amp; Other Puzzles (Mastermind Collection)\u003c\/strong\u003e by Moscovich, Ivan. paperback edition. ISBN: 9781402727337.\u003c\/p\u003e\n\u003cp\u003ePuzzles in perpetual motion—that’s what these are! Many of these bright brainteasers focus on ingenious, moving mechanisms, including an ancient Greek door-opening apparatus that featured one of the earliest uses of steam. Check out a perpetuum mobile invented by a famous American mathematician and see if you can successfully explain its theoretical principle of operation. A cartoon depicts a classic Lewis Carroll conundrum: there’s a monkey hanging on a tree holding one end of a rope while a bunch of bananas balance the other end in a state of equilibrium. What will happen if the monkey starts to climb? Other problems deal with gears and levers, while still more shift to number, counting, and calculation challenges.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Random House Books for Young Readers","offers":[{"title":"Default Title","offer_id":45794380841013,"sku":"ByrdShop_140272733X","price":65.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8139\/0901\/files\/9781402727337_3511ad54-e579-4734-8630-64996967ff44.jpg?v=1786565798","url":"https:\/\/atxbooks.com\/products\/brainflexing-balance-problems-other-puzzles-mastermind-collection-9781402727337","provider":"ATX Books","version":"1.0","type":"link"}