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Difficult Riddles For Smart Adults: 300 Brain Teasers, Trick Questions And Fun Challenges A Love For Creative Thinking Facts Women And Men Will Enjo By Memoirs, Quillscribe By Thriftbooks
Difficult Riddles For Smart Kids: 300 Awesome And Challenging Riddles, Trick Questions, And Brain Teasers To Exercise Your Mind While Having Fun! By Gecko, Sunny By Thriftbooks