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Calculate the number 731

NUMBERMANIA: Calculate the number 731 using numbers [7, 7, 2, 5, 64, 795] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 0

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Ernst Julius Cohen

Born 7 Mar 1869; died c. 5 Mar 1944 .Dutch chemist who researched piezochemistry, electrochemical thermodynamics, polymorphism of compounds and the allotropy of metals, especially tin. He examined the different properties of tin's allotropes: white tin which is the familiar stable form above 13.2ºC and the powdery gray tin stable below that temperature. (The crumbling transition at low temperature is slow and called tin pest by Cohen. Because the cold transformation can be initiated or accelerated by seeding white tin with traces of grey tin, it is also known as tin disease, as if infected.) Cohen's life ended in the Auschwitz death camp following his arrest as a Jew by Nazi occupation forces in 1944. The exact date of his death is uncertain.«

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