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Calculate the number 4774

NUMBERMANIA: Calculate the number 4774 using numbers [6, 5, 7, 8, 60, 973] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 28

The first user who solved this task is Sanja Šabović.

#brainteasers #math #numbermania

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Beer Test

"Yesterday, scientists revealed that beer contains small traces of female hormones.

To prove their theory, the scientists fed 100 men 12 pints of beer and observed that 100% of them gained weight, talked excessively without making sense, became emotional, couldn't drive, and refused to apologize when wrong.

No further testing is planned."

Submitted by Calamjo

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Carl Auer, Freiherr von Welsbach

Died 4 Aug 1929 at age 70 (born 1 Sep 1858).Carl Auer Freiherr (baron) von Welsbach was an Austrian chemist, physicist and engineer whose invention of the gas mantle greatly improved the brightness of light that could be obtained from gas lamps. While doing flame tests to examine the spectrum of certain rare earth compounds, he observed the small beads of test material on a platinum wire became white-hot and incandescent. He then had the idea to soak cotton webbing with a solution of the salts, then burn out the cotton leaving a matrix of the compound. His experiments began with slightly promising results with lanthanum oxide, then a mixture with magnesia. He also tried zirconium oxides and others before adding thorium oxide which made commercially viable mantles. His invention was adopted around the world wherever manufactured gas was available, meaning he had a profitable business improving and manufacturing them.«

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