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Calculate the number 823

NUMBERMANIA: Calculate the number 823 using numbers [3, 3, 6, 8, 48, 421] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 24

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math #numbermania

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A blonde walks into a doctor...

A blonde walks into a doctor's office and says, "Doc, I'm horribly sick!"
The doctor looks at her and asks, "Flu?"
"No, I drove here."

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Aerosol

In 1941, a patent for the first aerosol can used in a commercial application was filed by chemist Lyle D. Goodhue and entomologist William N. Sullivan, researchers at the U.S. Dept. of Agriculture. It was titled a “Dispensing Apparatus” (U.S. No. 2,331,117, issued 5 Oct 1943). To apply oil-free insecticides in mushroom houses, they dissolved an insecticide in a nonflammable, liquefied gas under pressure in a strong steel container. The insecticide was allowed to escape in a fine spray through an oil burner nozzle. During WW II similar cans, dubbed “bug bombs,” were used to protect troops from malaria-carrying mosquitoes. Under the public service patent, royalty-free licenses were issued for the manufacture of insecticidal aerosols until the patent expired in 1960. Many improvements followed.Image from 1947 ad for Westinghouse household Bug Bomb.

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