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Calculate the number 4344

NUMBERMANIA: Calculate the number 4344 using numbers [3, 7, 9, 9, 57, 471] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 21

The first user who solved this task is Sanja Šabović.

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April Fools' Day Pranks - Picture This

Take a screenshot of the desktop of Dad's computer, and leave the image open. Sit back and let him freak out for a few minutes, believing the computer is frozen.

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Hans Buchner

Born 16 Dec 1850; died 5 Apr 1902 at age 51.Hans Ernst Angass Buchner was a German bacteriologist who discovered gamma globulins, natural bactericides carried in the blood, while making immunological studies in1886-90. He also devised methods of studying anaerobic bacteria. In 1891, Buchner proposed the existence of antibacterial proteins in blood serum which he called "alexines". This began a protracted debate with Metchnikoff, who championed a cellular theory of immunity. In 1893, he proposed that antitoxin formed directly from the toxin itself. With his brother, Eduard, in 1897, Hans demonstrated that completely dead yeast juice could ferment sugar, forming carbon dioxide and alcohol, exactly as the intact cells would have done. This presaged the description of enzyme activity.

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