How much money did Darlene start with?
[2700] How much money did Darlene start with? - Franklin lent Darlene as much money as she already had, then she spent $10. The next day, Franklin lent her as much money as she now had and again, she spent $10. On the third day Franklin once again lent her as much money as she now had and she spent $10, leaving her broke. How much money did Darlene start with? Express result to the accuracy of 2 decimal. - #brainteasers #math #riddles - Correct Answers: 69 - The first user who solved this task is Roxana zavari
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How much money did Darlene start with?

Franklin lent Darlene as much money as she already had, then she spent $10. The next day, Franklin lent her as much money as she now had and again, she spent $10. On the third day Franklin once again lent her as much money as she now had and she spent $10, leaving her broke. How much money did Darlene start with? Express result to the accuracy of 2 decimal.
Correct answers: 69
The first user who solved this task is Roxana zavari.
#brainteasers #math #riddles
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Parking

A policeman was patrolling a local parking spot overlooking a golf course. He drove by a car and saw a couple inside with the dome light on. There was a young man in the driver's seat reading a computer magazine and a young lady in the back seat knitting. He stopped to investigate.
He walked up to the driver's window and knocked. The young man looked up, cranked the window down, and said, "Yes, officer?"
"What are you doing?" the policeman asked.
"What does it look like?" answered the young man. "I'm reading a magazine."
Pointing towards the young lady in the back seat, the officer then asked, "And what is she doing?"
The young man looked over his shoulder and replied, "What does it look like? She's knitting."
"And how old are you?" the officer then asked the young man.
"I'm nineteen," he replied.
"And how old is she?" asked the officer.
The young man looked at his watch and said, "Well, in about twelve minutes she'll be eighteen."

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Donald William Kerst

Died 19 Aug 1992 at age 80 (born 1 Nov 1911).American physicist who invented the betatron (1940), the first device to accelerate electrons (“beta particles”) to speeds high enough to have sufficient momentum to produce nuclear transformations in atoms. The electrons are accelerated by electromagnetic induction in a doughnut-shaped (toroidal) ring from which the air has been removed. This type of particle accelerator can produce high-energy electrons up to 340 MeV for research purposes, including the production of high-energy X-rays. For such high velocities, the magnetic field is increased to match the relativistic increase in mass of the particles. During WW II, Kerst worked at Los Alamos on tue atomic bomb project. He completed the largest betatron in 1950, at the University of Illinois.
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