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Calculate the number 5696

NUMBERMANIA: Calculate the number 5696 using numbers [5, 7, 9, 9, 23, 822] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

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Edison receives first patent

In 1869, Thomas Edison of Boston, Mass., received his first patent. It was for an "electrographic vote recorder." The device was the first of its kind, and would enable a legislator to register a vote either for or against an issue by turning a switch to the right or left. His application was executed on 13 Nov 1868 and submitted to the U.S. Patent Office on 28 Nov 1868 (No. 90646).

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