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Calculate the number 1669

NUMBERMANIA: Calculate the number 1669 using numbers [3, 5, 9, 6, 39, 344] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 0

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Paying For His Mistake

A husband and wife had a big argument. Frustrated and fed up, the wife called up her mom and said, "We fought again, I can't do this anymore. I am coming to live with you."

Mom said, "No darling, he must pay for his mistake. I am coming to live with you."

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Eli Whitney

Born 8 Dec 1765; died 8 Jan 1825 at age 59. American inventor, mechanical engineer, and manufacturer, who invented the cotton gin and developed the idea and methods for mass-production of interchangeable parts. The cotton gin is a machine that separates cotton fibre from the seeds. The device, patented in 1793, greatly stimulated cotton growing in the southern USA. Whitney subsequently turned to firearms manufacture, into which he introduced the notion of interchangeable parts. This he applied in his fulfilment of a US government contract (1797) to supply muskets. Whitney manufactured these in standardized parts for reassembly, meaning that for the first time worn parts could be replaced by spares rather than requiring special replacements to be made.

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