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Find number abc

If 9b222 - 5b753 = 39ac9 find number abc. Multiple solutions may exist.

Correct answers: 41

The first user who solved this task is Nílton Corrêa De Sousa.

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Johann Friedrich Blumenbach

Born 11 May 1752; died 22 Jan 1840 at age 87.German anthropologist, physiologist and comparative anatomist, frequently called the father of physical anthropology, who proposed one of the earliest classifications of the races of mankind. He divided humanity into five races: Caucasian, Ethiopian, American, Mongolian, and Malay. Blumenbach coined the term Caucasian (derived from the residents of Georgia in the Caucasus Mountains) to describe the white race; and the term Mongolian. Blumenbach was a pioneer collector of human crania and was among the first to place comparative anatomy on a completely scientific basis. His book Collectionis Suae Craniorum Diversarum Gentium Illustratae Decades (1790-1828) contains the results of his observations of the skulls of different races.

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