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Calculate the number 518

NUMBERMANIA: Calculate the number 518 using numbers [7, 3, 2, 9, 43, 658] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 11

The first user who solved this task is Nílton Corrêa de Sousa.

#brainteasers #math #numbermania

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Auctions and golf...

A wife and husband both talked in their sleep. She loved auctions; his hobby was golf.

The other night, as they slept, the golfer yelled, "Fore!"

His wife yelled back, "Four and a quarter !"

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Thomas Mudge

Died 14 Nov 1794 (born Sep 1717).English watchmaker who invented the lever escapement (about 1757). He made one for Queen Charlotte, but few others. It eventually came to displace all other types of watch escapements, and remains the only type of escapement being presently manufactured for watches. It consists of an escape wheel, the "lever" itself and a balance wheel. The lever, when acted on by the balance wheel, locks and unlocks the escape wheel, allowing power to flow through the gear train in a uniform motion. He was the first to use stones for pallets and impulse pins. From 1771, he worked on the development of the chronometer. He sent one for its first trial in 1774, for which he was eventually was awarded £3,000 by the House of Commons.

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