Calculate the number 366
NUMBERMANIA: Calculate the number 366 using numbers [3, 8, 7, 7, 78, 142] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 1
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Carborundum furnaceIn 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.« |