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Calculate the number 7792

NUMBERMANIA: Calculate the number 7792 using numbers [7, 4, 5, 8, 40, 623] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

#brainteasers #math #numbermania

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I am sorry doctor...

"I'm sorry doctor, I know this is unusual but I seem to have a lettuce stuck in my bottom!"
"Good grief," the doctor replies, "I'd better take a look."
"It's worse than that," the doctor says after the examination. "That's just the tip of the iceberg."

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Donald B. Keck

Born 2 Jan 1941.American research physicist, who with his colleagues at Corning Glass, Dr. Robert Maurer and Dr. Peter Schultz, invented fused silica optical waveguide - optical fiber. This was a breakthrough creating a revolution in telecommunications, capable of carrying 65,000 times more information than conventional copper wire. In 1970, Maurer, Keck, and Schultz solved a problem that had previously stumped scientists around the world. They designed and produced the first optical fiber with optical losses low enough for wide use in telecommunications. The light loss was limited to 20 decibels per kilometer (at least one percent of the light entering a fiber remains after traveling one kilometer).

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