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Find number abc

If ba42c - 70baa = 205a7 find number abc. Multiple solutions may exist.

Correct answers: 2

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A Bag of Air

I bought a bag of air today…
The company that made it was kind enough to put some potato chips in it as well.

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Adding machine

In 1872, the first U.S. patent for an adding machine capable of printing totals and subtotals, called a "calculating machine," was issued to E.D. Barbour of Boston, Mass. However, it was not practical. (No. 133,188)

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