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Find number abc

If b49a9 - c613b = bcc1 find number abc. Multiple solutions may exist.

Correct answers: 4

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Can't Do Without It

Duct tape is like 'The Force'...
It has a light side and a dark side, and it holds the universe together.

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African-American invention

In 1899, "Life Saving Guards for Street Cars" were patented by the black American inventor, J.H. Robinson (No, 623,929), who the previous month was issued a patent for life saving guards for locomotives (14 Mar 1899, No. 621,143).

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