Find the number of ways to p...
[1832] Find the number of ways to p... - Find the number of ways to place three black pawns on a chessboard. - #brainteasers #math - Correct Answers: 23 - The first user who solved this task is Neelima Subrahmanyam
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Find the number of ways to p...

Find the number of ways to place three black pawns on a chessboard.
Correct answers: 23
The first user who solved this task is Neelima Subrahmanyam.
#brainteasers #math
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An Israeli doctor says...

An Israeli doctor says: "Medicine in my country is so advanced that we can take a kidney out of one man, put it in another, and have him looking for work in 6 weeks." A British doctor says: "That is nothing; we can take a lung out of one person, put it in another, and have him looking for work in 4 weeks." A Canadian doctor says: "In my country, medicine is so advanced that we can take half a heart out of one person, put it in another, and have them both looking for work in 2 weeks." A Nigerian doctor, not to be outdone, says: "You guys are way behind...... We just took a man with NO brain, made him President, and now the whole country is looking for work.
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Screw machine

In 1798, the first U.S. patent for a nut and bolt machine was issued to inventor David Wilkinson of Rhode Island. His machine for cutting screw threads incorporated a slide-rest, with a heavy carriage supported on three rollers Afterwards, his machine was operated by water power at Pawtucket Falls, RI. Wilson was a machinist who also produced iron forgings and castings for the cotton industry industry there, such as Slater's Mill. Wilkinson later produced a large general purpose lathe (1806), a pioneering advance that founded the American machine tool industry. [The first machine of importance for trimming the heads of nuts and bolts was invented later by Micah Rugg, who was issued U.S. patent No. 2,766 on 31 Aug 1842.]«
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