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Replace the question mark with a number

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

Correct answers: 454

The first user who solved this task is Roxana zavari.

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In retrospect

On a Saturday evening, I was watching a film with harsh organ music on the TV when I screamed, "Nooo! Do not enter that church, you stupid man!"

My wife came running from the kitchen and asked, "What are you watching?"

I replied, "Video of our marriage!"

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Walter H. Zinn

Born 10 Dec 1906; died 14 Feb 2000 at age 93.Walter Henry Zinn was a Canadian-American nuclear physicist who contributed to the U.S. atomic bomb project during World War II and to the development of the nuclear reactor. He collaborated with Leo Szilard, investigating atomic fission. In 1939, they demonstrated that uranium underwent fission when bombarded with neutrons and that part of the mass was converted into energy (given by E = mc²). This work led him into research into the construction of the atomic bomb during WW II. After the war Zinn started the design of an atomic reactor and, in 1951, he built the first breeder reactor. In a breeder reactor, the core is surrounded by a “blanket”of uranium-238 and neutrons from the core convert this into plutonium-239, which can also be used as a fission fuel.

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