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Calculate the number 613

NUMBERMANIA: Calculate the number 613 using numbers [2, 8, 9, 4, 39, 538] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 17

The first user who solved this task is Nílton Corrêa de Sousa.

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Eugene Mirman: Kids Say the Darnedest Things

A lot of people think kids say the darnedest things, but so would you if you had no education.

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Sidney W. Fox

Died 10 Aug 1998 at age 86 (born 24 Mar 1912).Sidney Walter Fox was an American biochemist who was interested in the biological origin of life, rather than tracing a strictly biochemical path. He gave the name proteinoid to the protein-like polymer that results from a mixture of amino acids subjected to such considerable heating as would be present during the volcanic primordial earth. Fox observed that when proteinoids or "thermal proteins," are placed in water, they self-organize into microspheres or protocells, possible precursors of the contemporary living cell. Fox argued that RNA or DNA need not date back to the origin of life, and he showed that proteinoid microspheres exhibit growth, metabolism, reproduction (by budding), and responsiveness to stimuli - all properties of life - though without a genetic system.

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