Calculate the number 919
NUMBERMANIA: Calculate the number 919 using numbers [3, 8, 6, 2, 51, 782] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 1
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First U.S. railroad using the telephoneIn 1877, a trial test of a telephone was given in the Pennsylvania Railroad Company shops by associates of Alexander Graham Bell. The company was impressed by the demonstration and became the first to make a permanent installation.«* |