Calculate the number 672
NUMBERMANIA: Calculate the number 672 using numbers [5, 8, 8, 6, 16, 618] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 2
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Edison patentsIn 1883, Thomas A. Edison received a series of patent for some of his electrical inventions. One patent was for a "Dynamo-Electric Machine" (U.S. No. 278,419), and two for a "Regulator for Dynamo-Electric Machines" (No. 278,413 and -4). Three of the patents covered the "Manufacture of Incandescing Electric Lamps" (No. 278,415; -6 and -7), and one for an "Apparatus for Translating Electric Currents From High to Low Tension," (No. 278418). In addition a Design Patent No. 13940 was issued for a "Design for Incandescing Electric Lamp." |