Calculate the number 841
NUMBERMANIA: Calculate the number 841 using numbers [2, 1, 1, 7, 54, 903] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 1
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Edison patentIn 1897, one of the various patents for a "Phonograph" was issued to Thomas Alva Edison (No.575151). It was one of several patents relating to his invention received by the patent office on 3 Dec 1890 that were issued on various dates between 27 Jun 1893 and 30 Sep 1898. |