Calculate the number 4433
[7151] Calculate the number 4433 - NUMBERMANIA: Calculate the number 4433 using numbers [2, 5, 6, 8, 50, 577] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 2
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Calculate the number 4433

NUMBERMANIA: Calculate the number 4433 using numbers [2, 5, 6, 8, 50, 577] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
#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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Rita Levi-Montalcini

Died 30 Dec 2011 at age 102 (born 22 Apr 1909). Italian-American neurologist who shared the Nobel Prize for Physiology or Medicine in 1986 (with Stanley Cohen) for her discovery of NGF (nerve growth factor), which stimulates and influences both the normal and abnormal the growth of nerve cells in the body. In Italy, as a Jew, during WW II she was denied an academic career by Mussolini's laws, so she set up a laboratory in her home to study the growth of nerve fibers in chicken embryos. In 1952, while at a cell culture laboratory in Rio de Janeiro, she found effective new ways to detect a chemical exuded by tumors that produced astonishing growth of nerve fibers. This was the discovery of the nerve growth factor that won her the Nobel Prize.«
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