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Replace the question mark with a number

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

Correct answers: 796

The first user who solved this task is Дејан Шкребић.

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Black Eyes

A man walked into work on Monday with two black eyes. His boss asked what happened.
The man said, "I was sitting behind a big woman at church. When we stood up to sing hymns, I noticed that her dress was caught in her crack, so I pulled it out. She turned around and punched me square in the eye."
"Where did you get the other shiner?" the boss asked.

"Well," the man said, "I figured she didn't want it out, so I pushed it back in."

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Herbert Calhoun Reed

Born 16 Oct 1873; died 25 Jul 1940 at age 66.American chemist who was noted internationally as an analytical and consulting chemist to the leather industry and allied trades. From 1 Jan 1895 he spent 15 years as a chemist with the Stamford Mfg. Co., before establishing his own laboratory in New York City. He was one of nine leather industry chemists who founded the American Leather Chemists Association (22 Nov 1903) to establish reliable analytical methods for the commercial quality of materials used in the manufacture of leather, and to introduce scientific methods of tannery plant control. It was the outcome of a decade when a small number of chemists with a commercial interest in the product had worked to establish reliable analytical methods for analyzing the tanning extracts used in the industry, and to introduce scientific methods of tannery plant control. They devised a method of measuring the amount of tanning material absorbed by dried, ground hide. However, these formative years were still characterised by bitter disputes and wrangling among the chemists. Reed served as its secretary, and was its third president for one year. As one of the leading tanning chemists of the U.S., he wrote extensively on technical topics.«[Image: current logo of the American Leather Chemists Association (ALCA).]

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