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Calculate the number 1172

NUMBERMANIA: Calculate the number 1172 using numbers [9, 3, 3, 4, 72, 424] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 22

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math #numbermania

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A man went into a restaurant a...

A man went into a restaurant and asked for crab. When the waiter brought it, the man objected, "Just a minute, that crab only has one claw!"
"Yes, said the waiter, it was in a fight."
"Well," said the man, "Bring me the winner!"

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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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