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Calculate the number 5315

NUMBERMANIA: Calculate the number 5315 using numbers [3, 9, 3, 4, 40, 721] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 27

The first user who solved this task is Sanja Šabović.

#brainteasers #math #numbermania

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Charles Atwood Kofoid

Died 30 May 1947 at age 81 (born 11 Oct 1865). American zoologist whose classification of many new species of marine protozoans helped establish systematic marine biology. Named director of the University of Illinois Biological Experiment Station in Havana, IL. (1895-1903), Kofoid investigated plankton in the river and backwater lakes. He joined the newly founded Scripps Institution of Oceanography (1903). Kofoid was a member of their scientific staff on the US Fish Commission Steamer Albatross during the Albatross Expedition (l904-5) off the coast of San Diego, CA. Two summers (1908,9), he toured the marine biological stations of Europe, buying instruments and collecting information on buildings and aquaria to help plan the San Diego Marine Biological Station.

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