Brain-Flexing Balance Problems & Other Puzzles (Mastermind Collection)
"<P style=""MARGIN: 0in 0in 0pt; LINE-HEIGHT: 200%"">Puzzles 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 use...
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| Format: | Book |
| Language: | Undetermined |
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Sterling
2006
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