Calculate the number 417
[4723] Calculate the number 417 - NUMBERMANIA: Calculate the number 417 using numbers [8, 7, 9, 3, 30, 251] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 25 - The first user who solved this task is Djordje Timotijevic
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Calculate the number 417

NUMBERMANIA: Calculate the number 417 using numbers [8, 7, 9, 3, 30, 251] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 25
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #numbermania
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The CEO was scheduled to speak...

The CEO was scheduled to speak at an important convention, so he asked one of his employees to write him a punchy, 20-minute speech.
When the CEO returned from the big event, he was furious. "What's the idea of writing me an hour-long speech?" he demanded to know. "Half the audience walked out before I finished."
The employee was baffled. "I wrote you a 20-minute speech," he replied. "I also gave you the two extra copies you asked for."
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Johan Gottlieb Gahn

Died 8 Dec 1818 at age 73 (born 19 Aug 1745).Swedish mineralogist and crystallographer who was born in an iron-ming town, and followed mining as a career. At the copper mine in Falun, he improved smelting methods and the use of by-products. He discovered manganese (1774), and also selenium. Gahn assisted his friend Carl Wilhelm Scheele (discoverer of chlorine) in finding phosphoric acid in bones. His limited published work included essays on the balance and use of the blowpipe as a convenient analytical tool. During the American Revolutionary War, one of his companies supplied copper for sheathing ships. Gahnite, a dark green to brown or black mineral, (ZnAl2O4), also called zinc spinel was named after Gahn.
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