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Calculate the number 9487

NUMBERMANIA: Calculate the number 9487 using numbers [1, 2, 7, 5, 12, 690] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 27

The first user who solved this task is Sanja Šabović.

#brainteasers #math #numbermania

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There was a sign han...

“There was a sign hanging in the window of a dry cleaners I passed by. It read: 'So-and-So Dry Cleaners. Working on the same spot for 72 years.'”

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William Stewart Halsted

Died 7 Sep 1922 at age 69 (born 23 Sep 1852). American surgeon who established the first U.S. surgical school. In 1884, he was first to describe injection of cocaine into the trunk of a sensory nerve to block pain transmission. From 1886, he joined research at a pathological laboratory newly-formed in Baltimore, Md. where he developed strict aseptic surgical techniques with fine silk sutures in small stitches and careful tissue handling that gave safer, more effective results. In 1890, Halsted began use of rubber gloves, the year he was appointed first surgeon-in-chief at Johns Hopkins Hospital. Halsted created there subspecialty divisions such as orthopedics, otolaryngology and urology. His successful training of surgeons was spread as those he taught took up careers at other institutions.«

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