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MATH PUZZLE: Can you replace...

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

Correct answers: 4212

The first user who solved this task is Donya Sayah30.

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American Chemical Society

In 1877, the first U.S. national society for chemists was chartered. After some preliminary meetings, the American Chemical Society had been formally organized in New York City on 20 Apr 1876. The first president was John William Draper. The society was incorporated as a non-profit, nonstock corporation of the state of New York, for “the advancement of chemistry and the promotion of chemical research.”It was predated by the Chemical Society of Philadelphia, the first such society in the world, which was founded in 1792 by James Woodhouse.

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