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Calculate the number 6930

NUMBERMANIA: Calculate the number 6930 using numbers [5, 2, 4, 1, 65, 763] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 24

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

#brainteasers #math #numbermania

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Nicolas Leblanc

Born 6 Dec 1742; died 16 Jan 1806 at age 63.French surgeon and chemist who in 1790 developed the process for making soda ash (sodium carbonate) from common salt (sodium chloride). This process, which bears his name, became one of the most important industrial chemical processes of the 19th century. In the Leblanc process, salt was treated with sulphuric acid to obtain salt cake (sodium sulphate). This was then roasted with limestone or chalk and coal to produce black ash, which consisted primarily of sodium carbonate and calcium sulphide. The sodium carbonate was dissolved in water and then crystallized. The Leblanc process was simple, cheap, and direct, but because of the disruption of the French Revolution, he profitted little from it. He died by suicide in 1806.

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