Replace the question mark with a number
[3384] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 296 - The first user who solved this task is Djordje Timotijevic
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 296
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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Jon Dore: Ability to Hide

My grandfather avoided the Holocaust with his ability to hide, and by not being Jewish, and by living in Canada his entire life -- all about strategy.
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Seawater conversion plant

In 1961, the first practical plant for the conversion of seawater to drinking water was dedicated when President John Kennedy pressed a switch installed in his office in Washington D.C. It was built in less than a year at a cost of $1.5 million at Freeport, Texas by the Dow Chemical Co. The plant was capable of producing about a million gallons of water a day, supplying fresh water to the city of Freeport at a cost of about $1.25 per thousand gallons. The plant was opened 8 May 1961, by the Office of Saline Water, U.S. Department of the Interior. The large-scale evaporation method used then has now been replaced by reverse osmosis as scientific advances have produced special polymers suitable for use as filtering membranes.
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