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MATH PUZZLE: Can you replace...

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

Correct answers: 143

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

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Charles Richard Drew

Died 1 Apr 1950 at age 45 (born 3 Jun 1904). Black-American physician and surgeon who was an authority on the preservation of human blood for transfusion. He organized and directed the blood-plasma programs of the United States and Great Britain in the early years of World War II, while also agitating the authorities to stop excluding the blood of blacks from plasma-supply networks. His death resulted from a car accident.

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