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# Calculate the number 8971

NUMBERMANIA: Calculate the number 8971 using numbers [2, 8, 9, 5, 92, 852] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #numbermania

### An elderly gentleman of 85 fea...

An elderly gentleman of 85 feared his wife was getting hard of hearing. So one day he called her doctor to make an appointment to have her hearing checked. The Doctor made an appointment for a hearing test in two weeks, and meanwhile there's a simple informal test the husband could do to give the doctor some idea of the state of her problem.
"Here's what you do," said the doctor, "start out about 40 feet away from her, and in a normal conversational speaking tone see if she hears you. If not, go to 30 feet, then 20 feet, and so on until you get a response."
That evening, the wife is in the kitchen cooking dinner, and he's in the living room. He says to himself, "I'm about 40 feet away, let's see what happens."
Then in a normal tone he asks, "Honey, what's for supper?" No response.
So the husband moved to the other end of the room, about 30 feet from his wife and repeats, "Honey, what's for supper?" Still no response.
Next he moves into the dining room where he is about 20 feet from his wife and asks, "Honey, what's for supper?" Again he gets no response.
So he walks up to the kitchen door, only 10 feet away. "Honey, what's for supper?" Again there is no response.
So he walks right up behind her. "Honey, what's for supper?"
"Damn it Earl, for the fifth time, CHICKEN!"
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### WD-40 invention

In 1953, WD-40 was invented and recorded for the first time in the Rocket Chemical Company's logbook. It was the Water Displacement 40th test, and first successful, formula created by Norm Larsen, for a lubricating penetrating oil intented to displace water for rust prevention. In 1958, it was packaged in cans and sold to the consumer market in San Diego, California, where the company was founded in 1953. It was named WD-40, its original test designation. The name of the company Larsen founded reflects its original purpose to supply materials used in manufacture of nuclear missiles, for which WD-40 was designed to coat structural components and prevent corrosion. After wide success with its versatile, but only product, the company name was changed in 1969 to the WD-40 Company Inc.«
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