Calculate the number 297
[3574] Calculate the number 297 - NUMBERMANIA: Calculate the number 297 using numbers [3, 9, 7, 9, 15, 263] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 38 - The first user who solved this task is Eric Mosqueda
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Calculate the number 297

NUMBERMANIA: Calculate the number 297 using numbers [3, 9, 7, 9, 15, 263] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 38
The first user who solved this task is Eric Mosqueda.
#brainteasers #math #numbermania
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Three envelopes

Sometime after Sidney died, his widow, Tillie, was finally able to speak about what a thoughtful and wonderful man her late husband had been.

"Sidney thought of everything," she told them. "Just before he died, Sidney called me to his bedside. He handed me three envelopes. `Tillie,' he told me, 'I have put all my last wishes in these three envelopes. After I am dead, please open them and do exactly as I have instructed. Then I can rest in peace'."

"What was in the envelopes?" her friends asked.

"The first envelope contained $5,000 with a note, 'Please use this money to buy a nice casket.' So I bought a beautiful mahogany casket with such a comfortable lining that I know Sidney is resting very comfortably.

"The second envelope contained $10,000 with a note, 'Please use this for a nice funeral.' I arranged Sidney a very dignified funeral and bought all his favorite foods for everyone attending."

"And the third envelope?" asked her friends.

"The third envelope contained $25,000 with a note, 'Please use this to buy a nice stone.'

Holding her hand in the air and showing off her ten carat diamond ring., Tillie said, "So, do you like my stone?"

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Pneumatic subway opened

In 1870, New York City's first pneumatic-powered subway line was opened to the public. It was built by Alfred Ely Beach who included a waiting room 120 feet long (the entire tunnel measured 312 feet) and embellished it with a grand piano, a fountain, ornate paintings, and candelabra so customers would not feel they were entering a dank, dreary tunnel. The twenty-two-seat subway car impressed observers with its rich upholstery and spaciousness, and comfortable ride. It fitted snugly into the nine foot diameter, cylindrical tube. Propulsion was provided by a giant fan that the workers nicknamed "the Western Tornado." It was operated by a steam engine, drawing air in through a valve and blowing it forcefully into the tunnel.American inventor and editor of Scientific American magazine which reported on technology developments and patents in the 19th-century. It is still published today, one of the world's leading science magazines. Beach himself invented a tunneling shield and built the pneumatic tube subway which propelled a carriage by means of air pressure generated by huge fans. The tunnel was short—one block—so it operated as a demonstration (1870-73), with one station and train car. In 1856 he won First Prize and a gold medal at New York's Crystal Palace Exhibition. Beach had invented a typewriter for the blind, resembling the modern typewriter in the arrangement of its keys and typebars, but embossed its letters on a narrow paper strip instead of a sheet.[Image: Tunnel entrance.]
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