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Find number abc

If 3b8cb - cbb96 = b06ca find number abc. Multiple solutions may exist.

Correct answers: 5

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Forgot

I was going to do something, then i got distracted for 5 seconds and forgot.

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Refrigeration patent

In 1950, black American inventor F.M. Jones was issued a patent for a "System for Controlling Operation of Refrigeration Units" (No. 2,509,099).

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