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Calculate the number 9763

NUMBERMANIA: Calculate the number 9763 using numbers [7, 5, 5, 6, 90, 769] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 30

The first user who solved this task is Sanja Šabović.

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Hot Robin, Hot Summer

It's been really hot this summer.
The other day I saw a robin pulling a worm out of the ground using potholders.

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Recordak

In 1927, the Recordak, the first check photographing device began commercial manufacture by the Recordak Corporation, a newly-formed subsidiary of the Eastman Kodak Co., Rochester, NY. Designed to simplify bank records, the machine photographed checks onto 16mm film. It was invented by George Lewis McCarthy, who called it a Checkograph and was issued his patent on 25 Feb 1930 (No. 1,748,489). By 1935, it was also used in libraries for the purpose of making microfilm records, beginning with the New York Public Library photographing the New York Times of the WWI period. Microfilming itself began in the early 1800s. Microphotography for military purposes was first used in the Franco-Prussian war (1870 ).

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