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Find number abc

If c600b - aca02 = b670a find number abc. Multiple solutions may exist.

Correct answers: 30

The first user who solved this task is Djordje Timotijevic.

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Cigar lighter

In 1871, the first U.S. patent for a cigar lighter was issued to Moses F. Gale of New York City (No. 121,049) as an "Improvement in Cigar-Lighters." It described an ornamental mechanical device to be attached by a flexible tube to a gas supply. The gas for lighting cigars travelled through a hollow body of a device shaped such as a bird. The flow of gas was regulated by an internal valve actuated by the action of the body pivoting on a control screw.

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