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Find number abc

If 25aab - ccc22 = ca327 find number abc. Multiple solutions may exist.

Correct answers: 15

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Christmas gift from girlfriend

Your Christmas Joke of the Day from @anthonyjeselnik. http://on.cc.com/1x4Fxvs

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Edison patent

In 1889, Thomas A. Edison was issued a patent for an "Electrical Distribution System" (U.S. No. 404,902).

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