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Find number abc

If a491b + 12cc1 = 9cbac find number abc. Multiple solutions may exist.

Correct answers: 37

The first user who solved this task is Djordje Timotijevic.

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Uber is in trouble because it...

Uber is in trouble because it doesn't pay any taxi.

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Edison patents

In 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."

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