Find number abc
If aa1bb - 4bcab = 31480 find number abc. Multiple solutions may exist.Correct answers: 19
The first user who solved this task is Nílton Corrêa de Sousa.
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African-American inventionIn 1899, "Life Saving Guards for Street Cars" were patented by the black American inventor, J.H. Robinson (No, 623,929), who the previous month was issued a patent for life saving guards for locomotives (14 Mar 1899, No. 621,143). |