Mensa Mind Challenge Author:Robert Allen Mensa Mind Challenge includes more than 500 puzzles, from cunning numerical conundrums and testing word games to logic teasers, enigmatic lateral thinking tests, and abstract visual problems. They don't follow any special pattern, so you'll never know what challenge is lying in wait on the next page. Organized by level of difficulty from straigh... more »tforward to downright devilish, you'll get some practice in puzzle thinking with the easy section, build skills in the medium section, and develop an edge for the really hard part. No special skills or abilities are needed -- just common sense, basic literacy, the ability to think things through, and determination.« less