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Find number abc

If 647b2 - 62cb1 = 18a1 find number abc. Multiple solutions may exist.

Correct answers: 8

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"What do you do?" a young man asked the beautiful girl he was dancing with.

"I'm a nurse."

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"That would be miraculous. I work on the maternity ward."

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George Eugene Uhlenbeck

Born 6 Dec 1900; died 31 Oct 1988 at age 87. Dutch-American physicist who, with Samuel A. Goudsmit, proposed the concept of electron spin (Jan 1925) - a fourth quantum number which was a half integer. This provided Wolfgang Pauli's anticipated “fourth quantum number.” In their experiment, a horizontal beam of silver atoms travelling through a vertical magnetic field was deflected in two directions according to the interaction of their spin (either “up” or “down”) with the magnetic field. This was the first demonstration of this quantum effect, and an early confirmation of quantum theory. As well as fundamental work on quantum mechanics, Uhlenbeck worked on atomic structure, the kinetic theory of matter and extended Boltzmann's equation to dense gases.«

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