Calculate the number 399
[5696] Calculate the number 399 - NUMBERMANIA: Calculate the number 399 using numbers [7, 6, 7, 2, 12, 110] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 16 - The first user who solved this task is Djordje Timotijevic
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Calculate the number 399

NUMBERMANIA: Calculate the number 399 using numbers [7, 6, 7, 2, 12, 110] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 16
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #numbermania
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A 60-year-old man went to the...

A 60-year-old man went to the doctor for a check-up. The doctor told him, "You're in terrific shape. There's nothing wrong with you. Why, you might live forever. You have the body of a 35 year old. By the way, how old was your father when he died?"
The 60 year old responded, "Who said he was dead?"
The doctor was surprised and asked, "How old is he and is he very active?"
The 60 year old responded, "Well, he is 82 years old and he still goes skiing three times a season and surfing three times a week during the summer."
The doctor couldn't believe it. "Well, how old was your grandfather when he died?"
The 60 year old responded again, "Who said he was dead?"
The doctor was astonished. He said, "You mean to tell me you are 60 years old and both your father and your grandfather are alive? Is your grandfather very active?"
The 60 year old said, "He goes skiing at least once a season and surfing once a week during the summer. Not only that," said the patient, "my grandfather is 106 years old, and next week he is getting married again."
The doctor said, "At 106 years old, why on earth would your grandfather want to get married?"
His patient looked up at the doctor and said, "Who said he wanted to?"
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Teflon

In 1938, Du Pont researcher Roy J. Plunkett and his technician Jack Rebok accidentally discovered the chemical compound polytetrafluoroethylene (PTFE), later marketed as Teflon. Plunkett was researching chemical reactions of the gas perfluoroethylene in order to synthesize new types of refrigerant gases. Rebok found an apparently defective cylinder of this gas, since no pressure was found when the valve was opened, even though the cylinder weight was the same as full cylinders. Rebok suggested sawing it open to investigate. Inside was a slippery white powder. Plunkett found it had unusual properties, a wonderful solid lubricant in powdered form, was chemically inert and had a very high melting point. He realized it was formed by an unexpected polymerization. It was patented on 4 Feb 1941.
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