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Replace the question mark with a number

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

Correct answers: 350

The first user who solved this task is Roxana zavari.

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Answering Machine Message 55

English accent: Hello, you've reached the phone of Monty Python. I can't come to the phone right now because the witch has turned me into a newt! I'll call you back when I get better.

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Terramycin announced

In 1950, Science magazine announced the new antibiotic terramycin. Made by Charles Pfizer & Co., it was isolated from Indiana soil, and found effective against pneumonia, dysentery, and other infections. It was the first pharmaceutical discovered and developed exclusively by Pfizer scientists. This was the result of the company's intensive quest to find new organisms to fight disease. Acting on theories that bacteria-fighting organisms would be found in soil, Pfizer solicited soil samples worldwide, received 135,000 soil samples and conducted more than 20 million tests. Said one of the researchers, “We got soil samples from the bottom of mine shafts... from the bottom of the ocean... from the desert... mountains and in between.” Terramycin® was approved by the U.S. Food and Drug Administration on 15 Mar 1950.

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