Calculate the number 2040
[6980] Calculate the number 2040 - NUMBERMANIA: Calculate the number 2040 using numbers [1, 9, 2, 4, 55, 234] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 8 - The first user who solved this task is Nasrin 24 T
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Calculate the number 2040

NUMBERMANIA: Calculate the number 2040 using numbers [1, 9, 2, 4, 55, 234] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #numbermania
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Ballpen in space

When NASA first started sending up astronauts, they quickly discovered that ballpoint pens would not work in zero gravity.
To combat the problem, NASA scientists spent a decade and $12 billion to develop a pen that writes in zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from below freezing to 300 C.
The Russians used a pencil.

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Anthony Herman Gerard Fokker

Died 23 Dec 1939 at age 49 (born 6 Apr 1890).Dutch-American airman and pioneer aircraft manufacturer who, having seen an airplane flight at age 16, was inspired to build his first airplane by age 20. This was a braced monoplane, the Spider he put assembled in an empty Zeppelin hangar in Baden-Baden, and flying it gained his pilot's licence. His first factory built many of Germany's WW I pursuit aircraft, and gained recognition, but at the end of the war was put out of business there by the treaty of Versailles. On 21 Jul 1919, he established a company for civil aircraft, in the Netherlands and subsequently started manufacturing in the U.S. He continued to influence airplane construction techniques, and adopted welded-steel tubing fusulage construction.«
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