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Find number abc

If 72b27 - ac9b5 = aabc2 find number abc. Multiple solutions may exist.

Correct answers: 35

The first user who solved this task is Nílton Corrêa De Sousa.

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Carborundum furnace

In 1896, Edward G. Acheson was issued a U.S. patent for an electric furnace used to produce carborundum (silicon carbide), one of the hardest industrial substances (No. 560,291). The furnace used an electric current passed through a core of carbon rods to produce a strong heating effect resulting from their resistance.«

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