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MATH PUZZLE: Can you replace...

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

Correct answers: 60

The first user who solved this task is Alfa Omega.

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Hans Christian Joachim Gram

Born 13 Sep 1853; died 14 Nov 1938 at age 85.Danish pharmacologist and pathologist, who invented the Gram stain, the best known and most widely used bacteriological staining method that is almost always the first test performed for the identification of bacteria..

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