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Calculate the number 5087

NUMBERMANIA: Calculate the number 5087 using numbers [2, 3, 4, 7, 40, 889] 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 boxer went to a doctor for t...

A boxer went to a doctor for treatment of insomnia.
"Have you tried counting sheep?" suggested the doctor.
"It doesn't work," replied the boxer. "Whenever I get to nine, I stand up!"

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Video recorder

In 1956, the first practical commercial black-and-white video recorder was demonstrated at a broadcast convention in Chicago and simultaneously in Redwood City, Ca. The VT-100 by Ampex Corporation of Redwood City was the size of a deep-freeze with an additional five 6-foot racks of circuitry. The 2-inch wide magnetic tape moved at a speed of 15 inches per second. The system had four heads on a disc rotating perpendicularly across the width of the tape, thus tracing an oblique track pattern. A single 14-inch reel could carry a 65-min. recording. The Columbia Broadcasting System purchased three of the video recorders in 1956, priced at $75,000 for each unit, and first broadcast from tape on 30 Nov 1956.

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