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Calculate the number 8510

NUMBERMANIA: Calculate the number 8510 using numbers [1, 5, 9, 5, 78, 774] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 21

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math #numbermania

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Living will

A man and his wife were sitting in the living room discussing a "Living Will"

"Just so you know, I never want to live in a vegetative state, dependent on some machine and fluids from a bottle. If that ever happens, just pull the plug."

His wife got up, unplugged the TV and threw out all the beer.

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Typewriter

In 1843, the first U.S. design of a typewriter that successfully typed was issued a patent to Charles Thurber of Norwich, Conn. (No. 3,228) as a “machine for printing by hand by pressing upon keys which contain the type, called ‘Thurber's Patent Printer.’” He was the first to place the paper on a roller and give it longitudinal motion with provision for accurate letter and word spacing. It had a wheel carrying the keys around its circumference. A roller provided inking. However, the machine was slow to use, and only a concept model. Two years later, he patented a design for a writing (not typing) machine, which he called a Chirographer (18 Nov 1845, No. 4,271). On 27 Jun 1857, British Letters Patent were sealed (No. 1805) on Thurber's invention of “An improved caligraph.”«[Image: Thurber's Patent Printer of 1843.]

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