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Calculate the number 252

NUMBERMANIA: Calculate the number 252 using numbers [6, 6, 8, 7, 88, 990] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 29

The first user who solved this task is Sanja Šabović.

#brainteasers #math #numbermania

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Gabriel Iglesias: First Thing That Comes to Mind

Ill walk up to a woman, Ill say the first thing that comes to mind: Hey, you hungry?

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Daguerrotype

In 1839, the daguerreotype photo process was announced at the French Academy of Science. Previous photographic processes required hours of exposure, but the daguerrotype (named after its inventor Louis Daguerre) needed only a few seconds. The plate was prepared with a layer of photo-sensitive silver halide, was exposed, developed using mercury vapour, and fixed in a solution of sodium hyposulphite. The image remains delicate, and must be protected under glass against damage by touching. The daguerreotype was produced with a direct positive image, needing no intermediate negative, but thus could not yield multiple reproductions made possible by later photographic processes.«[Image: first daguerrotype portrait in the Library of Congress collection. It shows a self-portrait of Robert Cornelius (1809-1893).]

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