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Can you replace the question mark with a number?

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

Correct answers: 92

The first user who solved this task is Nasrin 24 T.

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Serving Two Masters

A Mormon acquaintance once pushed Mark Twain into an argument on the issue of polygamy. After long and tedious expositions justifying the practice, the Mormon demanded that Twain cite any passage of scripture expressly forbidding polygamy."Nothing easier," Twain replied. "No man can serve two masters."

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William H. Park

Born 30 Dec 1863; died 6 Apr 1939 at age 75.William Hallock Park was an American physician and bacteriologist who pioneered in the application of bacteriology to the diagnosis, prevention and treatment of the common infectious diseases. He was an authority on public health dealing with diphtheria, pneumonia, tuberculosis and poliomyelitis. Park began his career as a nose and throat specialist. He shortly became interested in the emerging science of bacteriology. In 1894, at the urging of Dr Hermann Biggs of the New York City Health Department, Park was given charge of a diagnostic laboratory for diphtheria. He developed a diphtheria antitoxin. At the turn of the 20th century, Park wrote a landmark paper The Great Bacterial Contamination of the Milk of Cities(1901), showing his concern to improve milk purity, with sanitary farm procedures, pasteurization and keeping the milk cool.«

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