BRAIN TEASERS

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Find the right combination

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Correct answers: 54

The first user who solved this task is James Lillard.

#brainteasers #mastermind

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How much?

A man meets a woman at a bar and asks her

"Would you have sex with me for 10 million dollars?"

Without skipping a beat she screams

"Yes!"

The man then asks

"What about for $20?"

She looks at him sideways and says

"What do you think I am, a whore?"

The man says

"We've already established that you are, now we're just negotiating."

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Hans Joachim Pabst von Ohain

Died 13 Mar 1998 at age 86 (born 14 Dec 1911).German aeronautical engineer who designed the first operational jet engine. Ohain, at age 22, conceived his theory of jet propulsion (1933) because to fly faster, airplanes could fly higher for lower air resistance, but there, propellers and piston engines worked badly. He saw turbojets as a solution, and took out his first patent on the gas-turbine jet engine in 1935, four years after Frank Whittle. By Sep 1937, Ohain had a hydrogen-fueled bench model producing a 250-km thrust. He designed the HeS3b turbojet engine that powered the first experimental jet aircraft, the He178, on its historic maiden flight at a top speed of about 350 mph on 27 Aug 1939, near Rostock, Germany. Whittle's first jet flew later, in 1941. His continued work on the gas-turbine engine during World War II resulted in abandonment of the centrifugal flow concept, and adoption of the axial flow compressor type engine. After WW II, Ohain worked for the U.S. airforce (1947-79). In 1945, he emigrated to the U.S. and became an engineer for the U.S. Air Force at its engine development centre. In 1956, Von Ohain became Director of the famed Air Force Aeronautical Research Laboratory.

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