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Calculate the number 1576

NUMBERMANIA: Calculate the number 1576 using numbers [5, 7, 2, 1, 36, 221] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 22

The first user who solved this task is Thinh Ddh.

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40 year curse

An old man goes to the Wizard to ask him if he can remove a curse he has been living with for the last 40 years.

The Wizard says: "Maybe, but you will have to tell me the exact words that were used to put the curse on you.

The old man says without hesitation: "I now pronounce you man and wife."

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Alkaline dry-cell patent

In 1960, a U.S. patent was issued for an alkaline dry-cell to P.A. Marsal, Karl Kordesch and Lewis F. Urry who assigned it to the Union Carbide Corporation, the manufacturer of Eveready batteries (No. 2,960,558). Compared to the existing carbon-zinc dry-cells, it offered an appreciable increase in life-span and efficiency during heavy continuous drains. Its construction used an alkaline electrolyte, manganese dioxide as depolarizer, a zinc powder-gel anode, and certain additives such including mercury and electrolyte-creep inhibitors. The patent gave practical details for commercial production. The patent claimed that whereas four cells in series of the carbon-zinc type gave 4.5 volts to power a 1.25-amp bulb for 45-min to 1-hr, the new alkaline design gave good brilliance after 6 to 7 hours.«

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