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Calculate the number 4109

NUMBERMANIA: Calculate the number 4109 using numbers [4, 6, 1, 5, 80, 743] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 25

The first user who solved this task is Manguexa Wagle.

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Dyslexic clairvoyant nurse

Hear about the dyslexic clairvoyant nurse who didn't bother to charge for her services, because she could fee into the suture?

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Thomas Newcomen

Died 5 Aug 1729 at age 66 (born 24 Feb 1663). English engineer and inventor of the the world's first successful atmospheric steam engine. His invention of c.1711 came into use by 1725 to pump water out of coal mines or raise water to power water-wheels. On each stroke, steam filled a cylinder closed by a piston, then a spray of water chilled and condensed the steam in the cylinder creating a vacuum, then atmospheric pressure pushed the piston down. A crossbeam transferred the motion of the piston to operating the pump. This was wasteful of fuel needed to reheat the cylinder for the next stroke. Despite being slow and inefficient, Newcomen's engine was relied on for the first 60 years of the new steam age it began, perhaps the single most important invention of the Industrial Revolution.

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