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Calculate the number 1617

NUMBERMANIA: Calculate the number 1617 using numbers [7, 3, 7, 3, 22, 552] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 11

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

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Seven days to live

Doctor: "I've got some bad news and some really bad news. The bad news is you only have a week to live."

Patient: "What could be worse news than that?"

Doctor: "I've been trying to contact you for the last 6 days."

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Lyman C. Craig

Born 12 Jun 1906; died 7 Jul 1974 at age 68.Lyman Creighton Craig was an American chemist who developed the counter-current distribution (CCD) method. Within five years of earning his Ph.D., he had designed and built a microdistillation apparatus (1936). Wartime research on antimarial drugs required identification of microgram amounts of an organic compound in a mixture, for which he devised a laboratory technique based on the distribution coefficient. He soon developed the CCD method for fractionation of complex mixtures with an apparatus that could simultaneously accomplish 20 quantitative extractions in a single step. A notable separation, from a difficult mixture, was the isolation and purified parathormone, the active principle of the parathyroid gland, achieved in 1960 with his colleagues. Craig also designed several other significant instruments, including his rotary evaporator, among others.«

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