Calculate the number 489
NUMBERMANIA: Calculate the number 489 using numbers [9, 9, 4, 5, 97, 992] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 4
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First woman U.S. patent examinerIn 1873, Anna Nichols of Melrose, Mass., became the first woman U.S. patent examiner. |