Calculate the number 905
[6083] Calculate the number 905 - NUMBERMANIA: Calculate the number 905 using numbers [7, 2, 4, 3, 46, 820] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 12 - The first user who solved this task is Nílton Corrêa de Sousa
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Calculate the number 905

NUMBERMANIA: Calculate the number 905 using numbers [7, 2, 4, 3, 46, 820] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 12
The first user who solved this task is Nílton Corrêa de Sousa.
#brainteasers #math #numbermania
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The salesman was demonstrating...

The salesman was demonstrating unbreakable combs in the department store. He was impressing the people who stopped by to look by putting the comb through all sorts of torture and stress.
Finally to impress even the skeptics in the crowd, he bent the comb completely in half, and it snapped with a loud crack. Without missing a beat, he bravely held up both halves of the 'unbreakable' comb for everyone to see and said,
"And this, ladies and gentlemen, is what an unbreakable comb looks like on the inside..."
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Mercury vapour lamp

In 1901, the first U.S. patents for a mercury vapour lamp were issued to inventor Peter Cooper Hewitt of New York City (Nos. 682,692-99). These eight patents covered the design of an elongated vacuum tube fitted with a mercury electrode at one end and an iron electrode at the other end. Light was produced when an electric current passed through the mercury vapour. However, it was a garish blue-green colour, lacking any red light. The lamps were subsequently manufactured by the Cooper Hewitt Electric Company in New York City, in Dec 1902. They were an important forerunner of today's fluorescent lights.«
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