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Find number abc

If 76acc - 10ba3 = 663ab find number abc. Multiple solutions may exist.

Correct answers: 8

The first user who solved this task is Nasrin 24 T.

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Why is 6 afraid of 7?

Why is 6 afraid of 7?
Because 7,8,9.

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Edison patent

In 1897, one of the various patents for a "Phonograph" was issued to Thomas Alva Edison (No.575151). It was one of several patents relating to his invention received by the patent office on 3 Dec 1890 that were issued on various dates between 27 Jun 1893 and 30 Sep 1898.

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