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Calculate the number 3371

NUMBERMANIA: Calculate the number 3371 using numbers [4, 3, 9, 5, 67, 807] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 9

The first user who solved this task is Nasrin 24 T.

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People don't always post on my Facebook wall

People don't always post on my Facebook wall but when they do, they wish me happy birthday and then ignore me for another year.

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Atomic chain reaction

In 1942, the first self-sustained nuclear chain reaction was demonstrated in Chicago, Illinois. At the University of Chicago, Enrico Fermi and his team achieved the world's first artificial nuclear chain reaction, in a makeshift lab underneath the University's football stands at Stagg Field. Work on the experimental pile had begun on 16 Nov 1942. It was a prodigious effort. Physicists and staffers, working around the clock, built a lattice of 57 layers of uranium metal and uranium oxide embedded in graphite blocks. A wooden structure supported the graphite pile. The chain reaction was part of the Manhattan Project, a secret wartime project to develop nuclear weapons, which initiated the modern nuclear age. This was a discovery that changed the world.

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