Equation Watch

Love a challenge? Try telling the time on this equation watch. Admittedly, you will most likely know the time from just glancing at the hand placement, but hey, now people know you're a maths geek. And all the best people are maths geeks.

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  Each hour has been replaced with an equation equalling that number.
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  Shower-proof
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  Regular time telling is too easy for your brain
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  Requires 1 x SR626SW (included)