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Calculate the number 4937

NUMBERMANIA: Calculate the number 4937 using numbers [8, 7, 9, 5, 58, 721] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 32

The first user who solved this task is Sanja Šabović.

#brainteasers #math #numbermania

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I've started working as...

I've started working as a porn writer, but its harder than expected.
There's just so many holes in the plot.

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Sewing Machine

In 1790, Thomas Saint, a London cabinet maker, patented possibly the first sewing machine, fitted with an awl that makes a hole in leather and allows a needle to pass through it. This machine made a chain stitch with a tambour-type needle to produce a mechanical crochet or chain stitch. No evidence exists that Saint produced a single machine, and those who in the 1880's followed his patent specifications failed. An earlier English patent (24 Jun 1755) by German mechanic, Charles Weisenthal, had described a two-pointed needle for mechanical sewing, but there was no mention of a machine to go with it.Image: Wilcox-Gibbs sewing machine, c.1890.

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