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Calculate the number 1556

NUMBERMANIA: Calculate the number 1556 using numbers [2, 1, 5, 5, 95, 362] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 8

The first user who solved this task is Nasrin 24 T.

#brainteasers #math #numbermania

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Only in America...

Only in America: We work hard on a farm so we can move into town, where we can make more money… so we can move back to the farm.

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Adding machine

In 1887, a patent for the adding machine was granted to Dorr Eugene Felt of Chicago, Illinois. His Comptometer was the first practical key-driven calculator with sufficient speed, reliablility and economic benefit. He called his original prototype the "Macaroni box", a rough model that Felt created over the year-end holidays in 1884-85. The casing was a grocery macaroni box, assembled with a jackknife using meat skewers as keys, staples as key guides and elastic bands for springs. Door improved his design, producing his earliest commercial wooden-box Comptometer from 1887 thru 1903, leading to the first steel case Model A (1904 that would be standard for the remainder for all "shoebox" models. Electric motor drive was introduced in the 1920's.

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