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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?

Correct answers: 214

The first user who solved this task is Eugenio G. F. de Kereki.

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Glenn Wool: Uncle Sam

You know who Uncle Sam is, hes that goat-faced dude who dresses like Apollo Creed. Hes always pointing at you. He wants you. Is that really the imagery we should be listening to? An uncle who looks like hes about to touch you? Uncle Sam wants you to keep a secret.

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Platform scale

In 1831, the first U.S. patent for a platform scale was issued to brothers Erastus and Thaddeus S. Fairbanks of St. Johnsbury, Vermont. Thaddeus invented and built it during the previous year, revolutionized weighing methods; earlier scales had been of the even-balance or steel-yard types. With the invention of the platform scale, the E. and T. Fairbanks and Company (which had until then been produced stoves, plows, forks, machines) began to specialize in manufacturing scales of all sizes. The business was successful, and grew to supply scales worldwide. On 13 Jan 1857, Thaddeus received the first U.S. patent for a railway track scale (No. 16381) which was introduced by their business. The company survives to the present day.

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