Calculate the number 987
NUMBERMANIA: Calculate the number 987 using numbers [8, 9, 1, 4, 15, 934] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 1
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Black American patentIn 1874, a U.S. patent for a "Steam Lubricator" was issued to the prolific Black American inventor, Elijah J. McCoy (No. 146,697). |