Test your cerebral mettle! 250 challenging puzzlers, divided into twenty-five 90-minute "laps," are coded for difficulty (hard to hardest). Reckon with five different types of obstacles as — Make a mental leap over verbal hurdles — Run circles around mathematical mind joggers — Plunge into the depths of spatial relationships — Flaunt your technological prowess Flex your mental muscles with lateral thinking puzzles. Answers provided. Black-and-white illustrations

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Founded in 2002, World of Books is a leading online destination for buying and selling both preloved and new books, committed to making sustainable reading accessible to all. With a mission to help people read more and waste less, World of Books offers a huge range of affordable, high-quality books ? giving both new and preloved titles a second life. The company also operates World of Books ? Sell Your Books, an easy-to-use platform that allows customers to trade in unwanted books for cash, helping to keep books in circulation while promoting sustainability. As a Certified B Corp, World of Books is driven by a vision to become the world?s largest and most sustainable dedicated online bookstore. The company measures its success through the positive environmental impact it creates, the value it provides to customers, and its ability to operate profitably while supporting its sustainable mission

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