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Find number abc

If c8b3c - ca9c9 = ba6 find number abc. Multiple solutions may exist.

Correct answers: 23

The first user who solved this task is Nasrin 24 T.

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Birds changing lightbulb

How many birds does it take to change a lightbulb?

Ideally three, but Toucan.

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Jean de Hautefeuille

Born 20 Mar 1647; died 18 Oct 1724 at age 77.French physicist who built a primitive internal-combustion engine which was intended to operate a pump. The piston was pushed back by the explosion of a small charge of gunpowder, and then returned as the combustion gases cooled, leaving a partial vacuum. He wrote on many topics, including acoustics, optics, tidal phenomena, and watch mechanisms. He also invented the micrometer microscope to measure the size of minute objects.

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