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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?

Correct answers: 73

The first user who solved this task is Djordje Timotijevic.

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World Book and Copyright Day Joke

April 23rd is World Book and Copyright Day! Find a joke about it!

A man walks into a library and asks the librarian, "Do you have any books on how to create suspense?"
The librarian pauses for a moment, then says, "Yes, but I'm not going to tell you where they are!"

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Vincent du Vigneaud

Died 11 Dec 1978 at age 77 (born 18 May 1901).American biochemist who was awarded the Nobel Prize for Chemistry in 1955 for his work on biochemically important sulphur compounds, especially for the first synthesis of a polypeptide hormone. Underneath the brain, the pituitary gland is well-protected and, in man about as big as a bean. It secretes several hormones, that is, substances which regulate important physiological functions. These are built up from amino acids in the same way as proteins, but with a far lower molecular weight. Vigneaud isolated and synthesized two pituitary hormones: vasopressin, which acts on the muscles of the blood vessels to cause elevation of blood pressure; and oxytocin, the principal agent causing contraction of the uterus and secretion of milk.

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