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Find number abc

If 7a7bc - abb70 = 791c find number abc. Multiple solutions may exist.

Correct answers: 20

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A Guy was staying in a fancy h...

A Guy was staying in a fancy hotel and was enjoying the pool when the manager told him quite bluntly to get out. When asked for the reason, the manager said, "Because you peed in the pool."
"Well," replied the swimmer, "lots of people do that."
"True," answered the manager, "but you did it from the diving board."

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Axel Fredrik Cronstedt

Born 23 Dec 1722; died 19 Aug 1765 at age 42. Swedish chemist and metallurgist who was the first to isolate nickel (1751) and notice its slight magnetic properties. A new chemical classification of minerals he made was translated to several languages. Patterns he found in the internal structure of minerals enabled him to distinguish between simple one-compound minerals and those comprised of a mixture of several minerals. He discovered zeolite, a water-softening silicate and analysed the high-density mineral calcium tungstate. By adept use of the blowpipe to intensify a flame and burn a small quantity of a mineral he could make an identification of its chemical composition based on the colouring of the flame. He did not invent the instrument, but founded systematic blowpipe analysis technique.«

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