Solve This Number Puzzle
Find the next number in the series 1, 4, 5, 6, 7, 9, 11, ?Correct answers: 83
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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." |