http://tags.gizmodo.com/assets/base/img/thumbs140x140/gizmodo.com.png http://gizmodo.com/tag/mingyujeung http://gizmodo.com/tag/mingyujeung The arithmetic-challenged should avoid this lamp at all costs, because to turn it on, you're required to correctly solve a math problem. From the looks of this Mingyu Jeung creation, problems appear to be of the simple add/subtract/multiply/divide variety, so you don't need to be a math major to safely navigate your home. But if you're really bad at math, look on the "bright" side—you'll save a lot on your power bill! [Yanko Design]

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