Calculate the number 778
NUMBERMANIA: Calculate the number 778 using numbers [3, 4, 2, 4, 13, 146] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 1
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Shutter patentIn 1883, black American inventor J. Cooper was issued a patent for his invention, "Shutter and Fastening" (No. 276,563). In the next few years, he also patented elevator devices. |